diff --git a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/CommonFunctions.kt b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/CommonFunctions.kt
index f01b2af5..7ee3bcc4 100644
--- a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/CommonFunctions.kt
+++ b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/CommonFunctions.kt
@@ -59,14 +59,14 @@ fun parseDate(dateAsString: String): Calendar {
 
 fun <T : SubsonicResponse> checkErrorCallParsed(mockWebServerRule: MockWebServerRule,
                                                 apiRequest: () -> Response<T>): T {
-    mockWebServerRule.enqueueResponse("generic_error_response.json")
+    mockWebServerRule.enqueueResponse("request_data_not_found_error_response.json")
 
     val response = apiRequest()
 
     assertResponseSuccessful(response)
     with(response.body()) {
         status `should be` SubsonicResponse.Status.ERROR
-        error `should be` SubsonicError.GENERIC
+        error `should be` SubsonicError.RequestedDataWasNotFound
     }
     return response.body()
 }
diff --git a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiErrorsTest.kt b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiErrorsTest.kt
new file mode 100644
index 00000000..34234a73
--- /dev/null
+++ b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiErrorsTest.kt
@@ -0,0 +1,51 @@
+package org.moire.ultrasonic.api.subsonic
+
+import org.amshove.kluent.`should equal`
+import org.amshove.kluent.`should not be`
+import org.amshove.kluent.`should throw`
+import org.junit.Test
+import org.moire.ultrasonic.api.subsonic.SubsonicError.Generic
+import org.moire.ultrasonic.api.subsonic.SubsonicError.WrongUsernameOrPassword
+import org.moire.ultrasonic.api.subsonic.response.SubsonicResponse
+import retrofit2.Response
+import java.io.IOException
+
+/**
+ * Integration test that checks validity of api errors parsing.
+ */
+class SubsonicApiErrorsTest : SubsonicAPIClientTest() {
+    @Test
+    fun `Should parse wrong username or password error`() {
+        mockWebServerRule.enqueueResponse("wrong_username_or_password_error.json")
+
+        val response = client.api.ping().execute()
+
+        response.assertError(WrongUsernameOrPassword)
+    }
+
+    @Test
+    fun `Should parse generic error with message`() {
+        mockWebServerRule.enqueueResponse("generic_error.json")
+
+        val response = client.api.ping().execute()
+
+        response.assertError(Generic("Some generic error message."))
+    }
+
+    @Test
+    fun `Should fail on unknown error`() {
+        mockWebServerRule.enqueueResponse("unexpected_error.json")
+
+        val fail = {
+            client.api.ping().execute()
+        }
+
+        fail `should throw` IOException::class
+    }
+
+    private fun Response<SubsonicResponse>.assertError(expectedError: SubsonicError) =
+            with(body()) {
+                error `should not be` null
+                error `should equal` expectedError
+            }
+}
diff --git a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetAvatarTest.kt b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetAvatarTest.kt
index deeab4a3..91acfe65 100644
--- a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetAvatarTest.kt
+++ b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetAvatarTest.kt
@@ -13,14 +13,14 @@ import org.junit.Test
 class SubsonicApiGetAvatarTest : SubsonicAPIClientTest() {
     @Test
     fun `Should handle api error response`() {
-        mockWebServerRule.enqueueResponse("generic_error_response.json")
+        mockWebServerRule.enqueueResponse("request_data_not_found_error_response.json")
 
         val response = client.getAvatar("some")
 
         with(response) {
             stream `should be` null
             responseHttpCode `should equal to` 200
-            apiError `should equal` SubsonicError.GENERIC
+            apiError `should equal` SubsonicError.RequestedDataWasNotFound
         }
     }
 
diff --git a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetCoverArtTest.kt b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetCoverArtTest.kt
index 3b22d396..d327e06c 100644
--- a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetCoverArtTest.kt
+++ b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiGetCoverArtTest.kt
@@ -13,14 +13,14 @@ import org.junit.Test
 class SubsonicApiGetCoverArtTest : SubsonicAPIClientTest() {
     @Test
     fun `Should handle api error response`() {
-        mockWebServerRule.enqueueResponse("generic_error_response.json")
+        mockWebServerRule.enqueueResponse("request_data_not_found_error_response.json")
 
         val response = client.getCoverArt("some-id")
 
         with(response) {
             stream `should be` null
             responseHttpCode `should equal to` 200
-            apiError `should equal` SubsonicError.GENERIC
+            apiError `should equal` SubsonicError.RequestedDataWasNotFound
         }
     }
 
diff --git a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiStreamTest.kt b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiStreamTest.kt
index b0255d66..730ee8a1 100644
--- a/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiStreamTest.kt
+++ b/subsonic-api/src/integrationTest/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicApiStreamTest.kt
@@ -13,14 +13,14 @@ import org.junit.Test
 class SubsonicApiStreamTest : SubsonicAPIClientTest() {
     @Test
     fun `Should handle api error response`() {
-        mockWebServerRule.enqueueResponse("generic_error_response.json")
+        mockWebServerRule.enqueueResponse("request_data_not_found_error_response.json")
 
         val response = client.stream("some-id")
 
         with(response) {
             stream `should be` null
             responseHttpCode `should equal to` 200
-            apiError `should equal` SubsonicError.GENERIC
+            apiError `should equal` SubsonicError.RequestedDataWasNotFound
         }
     }
 
diff --git a/subsonic-api/src/integrationTest/resources/generic_error.json b/subsonic-api/src/integrationTest/resources/generic_error.json
new file mode 100644
index 00000000..7118efc9
--- /dev/null
+++ b/subsonic-api/src/integrationTest/resources/generic_error.json
@@ -0,0 +1,10 @@
+{
+  "subsonic-response": {
+    "status": "failed",
+    "version": "1.15.0",
+    "error": {
+      "code": 0,
+      "message": "Some generic error message."
+    }
+  }
+}
diff --git a/subsonic-api/src/integrationTest/resources/generic_error_response.json b/subsonic-api/src/integrationTest/resources/request_data_not_found_error_response.json
similarity index 60%
rename from subsonic-api/src/integrationTest/resources/generic_error_response.json
rename to subsonic-api/src/integrationTest/resources/request_data_not_found_error_response.json
index 1b5db1cc..bd97c058 100644
--- a/subsonic-api/src/integrationTest/resources/generic_error_response.json
+++ b/subsonic-api/src/integrationTest/resources/request_data_not_found_error_response.json
@@ -3,8 +3,8 @@
     "status" : "failed",
     "version" : "1.13.0",
     "error" : {
-      "code" : 0,
-      "message" : "Generic error."
+      "code" : 70,
+      "message" : "Requested data was not found."
     }
   }
 }
\ No newline at end of file
diff --git a/subsonic-api/src/integrationTest/resources/unexpected_error.json b/subsonic-api/src/integrationTest/resources/unexpected_error.json
new file mode 100644
index 00000000..fce1661b
--- /dev/null
+++ b/subsonic-api/src/integrationTest/resources/unexpected_error.json
@@ -0,0 +1,10 @@
+{
+  "subsonic-response": {
+    "status": "failed",
+    "version": "1.15.0",
+    "error": {
+      "code": 1000000,
+      "message": "New funky error message."
+    }
+  }
+}
diff --git a/subsonic-api/src/integrationTest/resources/wrong_username_or_password_error.json b/subsonic-api/src/integrationTest/resources/wrong_username_or_password_error.json
new file mode 100644
index 00000000..a35e593b
--- /dev/null
+++ b/subsonic-api/src/integrationTest/resources/wrong_username_or_password_error.json
@@ -0,0 +1,10 @@
+{
+  "subsonic-response": {
+    "status": "failed",
+    "version": "1.15.0",
+    "error": {
+      "code": 40,
+      "message": "Wrong username or password."
+    }
+  }
+}
diff --git a/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicError.kt b/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicError.kt
index 06bbd508..89559cb2 100644
--- a/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicError.kt
+++ b/subsonic-api/src/main/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicError.kt
@@ -9,29 +9,41 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize
  * Common API errors.
  */
 @JsonDeserialize(using = SubsonicError.Companion.SubsonicErrorDeserializer::class)
-enum class SubsonicError(val code: Int) {
-    GENERIC(0),
-    REQUIRED_PARAM_MISSING(10),
-    INCOMPATIBLE_CLIENT_PROTOCOL_VERSION(20),
-    INCOMPATIBLE_SERVER_PROTOCOL_VERSION(30),
-    WRONG_USERNAME_OR_PASSWORD(40),
-    TOKEN_AUTH_NOT_SUPPORTED_FOR_LDAP(41),
-    USER_NOT_AUTHORIZED_FOR_OPERATION(50),
-    TRIAL_PERIOD_IS_OVER(60),
-    REQUESTED_DATA_WAS_NOT_FOUND(70);
+sealed class SubsonicError(val code: Int) {
+    data class Generic(val message: String) : SubsonicError(0)
+    object RequiredParamMissing : SubsonicError(10)
+    object IncompatibleClientProtocolVersion : SubsonicError(20)
+    object IncompatibleServerProtocolVersion : SubsonicError(30)
+    object WrongUsernameOrPassword : SubsonicError(40)
+    object TokenAuthNotSupportedForLDAP : SubsonicError(41)
+    object UserNotAuthorizedForOperation : SubsonicError(50)
+    object TrialPeriodIsOver : SubsonicError(60)
+    object RequestedDataWasNotFound : SubsonicError(70)
 
     companion object {
-        fun parseErrorFromJson(jsonErrorCode: Int) = SubsonicError.values()
-                .filter { it.code == jsonErrorCode }.firstOrNull()
-                ?: throw IllegalArgumentException("Unknown code $jsonErrorCode")
+        fun getError(code: Int, message: String) = when (code) {
+            0 -> Generic(message)
+            10 -> RequiredParamMissing
+            20 -> IncompatibleClientProtocolVersion
+            30 -> IncompatibleServerProtocolVersion
+            40 -> WrongUsernameOrPassword
+            41 -> TokenAuthNotSupportedForLDAP
+            50 -> UserNotAuthorizedForOperation
+            60 -> TrialPeriodIsOver
+            70 -> RequestedDataWasNotFound
+            else -> throw IllegalArgumentException("Unknown code $code")
+        }
 
         class SubsonicErrorDeserializer : JsonDeserializer<SubsonicError>() {
             override fun deserialize(p: JsonParser, ctxt: DeserializationContext?): SubsonicError {
-                p.nextToken() // "code"
-                val error = parseErrorFromJson(p.valueAsInt)
-                p.nextToken() // "message"
-                p.nextToken() // end of error object
-                return error
+                p.nextToken() // { -> "code"
+                p.nextToken() // "code" -> codeValue
+                val code = p.valueAsInt
+                p.nextToken() // codeValue -> "message"
+                p.nextToken() // "message" -> messageValue
+                val message = p.text
+                p.nextToken() // value -> }
+                return getError(code, message)
             }
         }
     }
diff --git a/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicErrorTest.kt b/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicErrorTest.kt
deleted file mode 100644
index 28258de9..00000000
--- a/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/SubsonicErrorTest.kt
+++ /dev/null
@@ -1,28 +0,0 @@
-package org.moire.ultrasonic.api.subsonic
-
-import org.amshove.kluent.`should equal`
-import org.junit.Test
-import org.junit.runner.RunWith
-import org.junit.runners.Parameterized
-
-/**
- * Unit test for [SubsonicError].
- */
-@RunWith(Parameterized::class)
-class SubsonicErrorTest(private val error: SubsonicError) {
-    companion object {
-        @JvmStatic
-        @Parameterized.Parameters
-        fun data(): List<SubsonicError> = SubsonicError.values().toList()
-    }
-
-    @Test
-    fun `Should proper convert error code to error`() {
-        SubsonicError.parseErrorFromJson(error.code) `should equal` error
-    }
-
-    @Test(expected = IllegalArgumentException::class)
-    fun `Should throw IllegalArgumentException from unknown error code`() {
-        SubsonicError.parseErrorFromJson(error.code + 10000)
-    }
-}
diff --git a/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/response/StreamResponseTest.kt b/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/response/StreamResponseTest.kt
index 76085241..ee3c0253 100644
--- a/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/response/StreamResponseTest.kt
+++ b/subsonic-api/src/test/kotlin/org/moire/ultrasonic/api/subsonic/response/StreamResponseTest.kt
@@ -2,7 +2,7 @@ package org.moire.ultrasonic.api.subsonic.response
 
 import org.amshove.kluent.`should equal to`
 import org.junit.Test
-import org.moire.ultrasonic.api.subsonic.SubsonicError.GENERIC
+import org.moire.ultrasonic.api.subsonic.SubsonicError.RequestedDataWasNotFound
 
 /**
  * Unit test for [StreamResponse].
@@ -10,7 +10,8 @@ import org.moire.ultrasonic.api.subsonic.SubsonicError.GENERIC
 class StreamResponseTest {
     @Test
     fun `Should have error if subsonic error is not null`() {
-        StreamResponse(apiError = GENERIC, responseHttpCode = 200).hasError() `should equal to` true
+        StreamResponse(apiError = RequestedDataWasNotFound, responseHttpCode = 200)
+                .hasError() `should equal to` true
     }
 
     @Test
diff --git a/ultrasonic/src/main/java/org/moire/ultrasonic/service/JukeboxService.java b/ultrasonic/src/main/java/org/moire/ultrasonic/service/JukeboxService.java
index 849d73ac..4d85b0b6 100644
--- a/ultrasonic/src/main/java/org/moire/ultrasonic/service/JukeboxService.java
+++ b/ultrasonic/src/main/java/org/moire/ultrasonic/service/JukeboxService.java
@@ -31,7 +31,6 @@ import org.moire.ultrasonic.R;
 import org.moire.ultrasonic.api.subsonic.ApiNotSupportedException;
 import org.moire.ultrasonic.domain.JukeboxStatus;
 import org.moire.ultrasonic.domain.PlayerState;
-import org.moire.ultrasonic.service.parser.SubsonicRESTException;
 import org.moire.ultrasonic.util.Util;
 
 import java.util.ArrayList;
diff --git a/ultrasonic/src/main/java/org/moire/ultrasonic/service/RESTMusicService.java b/ultrasonic/src/main/java/org/moire/ultrasonic/service/RESTMusicService.java
index 41b57e72..d9c7ca7d 100644
--- a/ultrasonic/src/main/java/org/moire/ultrasonic/service/RESTMusicService.java
+++ b/ultrasonic/src/main/java/org/moire/ultrasonic/service/RESTMusicService.java
@@ -89,7 +89,6 @@ import org.moire.ultrasonic.domain.SearchCriteria;
 import org.moire.ultrasonic.domain.SearchResult;
 import org.moire.ultrasonic.domain.Share;
 import org.moire.ultrasonic.domain.UserInfo;
-import org.moire.ultrasonic.service.parser.SubsonicRESTException;
 import org.moire.ultrasonic.util.CancellableTask;
 import org.moire.ultrasonic.util.FileUtil;
 import org.moire.ultrasonic.util.ProgressListener;
@@ -1077,7 +1076,7 @@ public class RESTMusicService implements MusicService {
     }
 
     private void checkResponseSuccessful(@NonNull final Response<? extends SubsonicResponse> response)
-            throws IOException {
+            throws SubsonicRESTException, IOException {
         if (response.isSuccessful() &&
                 response.body().getStatus() == SubsonicResponse.Status.OK) {
             return;
@@ -1087,7 +1086,7 @@ public class RESTMusicService implements MusicService {
             throw new IOException("Server error, code: " + response.code());
         } else if (response.body().getStatus() == SubsonicResponse.Status.ERROR &&
                 response.body().getError() != null) {
-            throw new IOException("Server error: " + response.body().getError().getCode());
+            throw new SubsonicRESTException(response.body().getError());
         } else {
             throw new IOException("Failed to perform request: " + response.code());
         }
diff --git a/ultrasonic/src/main/java/org/moire/ultrasonic/service/parser/SubsonicRESTException.java b/ultrasonic/src/main/java/org/moire/ultrasonic/service/parser/SubsonicRESTException.java
deleted file mode 100644
index 5ffbc3dd..00000000
--- a/ultrasonic/src/main/java/org/moire/ultrasonic/service/parser/SubsonicRESTException.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package org.moire.ultrasonic.service.parser;
-
-import org.moire.ultrasonic.api.subsonic.SubsonicError;
-
-/**
- * Exception returned by API with given {@code code}.
- *
- * @author Sindre Mehus
- * @version $Id$
- */
-public class SubsonicRESTException extends Exception {
-    private final SubsonicError error;
-
-    public SubsonicRESTException(final SubsonicError error) {
-        super("Api error: " + error.name());
-        this.error = error;
-    }
-
-    public int getCode()
-    {
-        return error.getCode();
-    }
-
-    public SubsonicError getError() {
-        return error;
-    }
-}
diff --git a/ultrasonic/src/main/java/org/moire/ultrasonic/util/BackgroundTask.java b/ultrasonic/src/main/java/org/moire/ultrasonic/util/BackgroundTask.java
index 4909a55b..ae47bdcb 100644
--- a/ultrasonic/src/main/java/org/moire/ultrasonic/util/BackgroundTask.java
+++ b/ultrasonic/src/main/java/org/moire/ultrasonic/util/BackgroundTask.java
@@ -25,7 +25,7 @@ import android.util.Log;
 import com.fasterxml.jackson.core.JsonParseException;
 
 import org.moire.ultrasonic.R;
-import org.moire.ultrasonic.service.parser.SubsonicRESTException;
+import org.moire.ultrasonic.service.SubsonicRESTException;
 import org.moire.ultrasonic.subsonic.RestErrorMapper;
 
 import java.io.FileNotFoundException;
diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/SubsonicRESTException.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/SubsonicRESTException.kt
new file mode 100644
index 00000000..4d315d0a
--- /dev/null
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/SubsonicRESTException.kt
@@ -0,0 +1,10 @@
+package org.moire.ultrasonic.service
+
+import org.moire.ultrasonic.api.subsonic.SubsonicError
+
+/**
+ * Exception returned by API with given `code`.
+ */
+class SubsonicRESTException(val error: SubsonicError) : Exception("Api error: ${error.code}") {
+    val code: Int get() = error.code
+}
diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/subsonic/RestErrorMapper.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/subsonic/RestErrorMapper.kt
index 32fc7982..385cdb25 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/subsonic/RestErrorMapper.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/subsonic/RestErrorMapper.kt
@@ -3,16 +3,16 @@ package org.moire.ultrasonic.subsonic
 
 import android.content.Context
 import org.moire.ultrasonic.R
-import org.moire.ultrasonic.api.subsonic.SubsonicError.GENERIC
-import org.moire.ultrasonic.api.subsonic.SubsonicError.INCOMPATIBLE_CLIENT_PROTOCOL_VERSION
-import org.moire.ultrasonic.api.subsonic.SubsonicError.INCOMPATIBLE_SERVER_PROTOCOL_VERSION
-import org.moire.ultrasonic.api.subsonic.SubsonicError.REQUESTED_DATA_WAS_NOT_FOUND
-import org.moire.ultrasonic.api.subsonic.SubsonicError.REQUIRED_PARAM_MISSING
-import org.moire.ultrasonic.api.subsonic.SubsonicError.TOKEN_AUTH_NOT_SUPPORTED_FOR_LDAP
-import org.moire.ultrasonic.api.subsonic.SubsonicError.TRIAL_PERIOD_IS_OVER
-import org.moire.ultrasonic.api.subsonic.SubsonicError.USER_NOT_AUTHORIZED_FOR_OPERATION
-import org.moire.ultrasonic.api.subsonic.SubsonicError.WRONG_USERNAME_OR_PASSWORD
-import org.moire.ultrasonic.service.parser.SubsonicRESTException
+import org.moire.ultrasonic.api.subsonic.SubsonicError.Generic
+import org.moire.ultrasonic.api.subsonic.SubsonicError.IncompatibleClientProtocolVersion
+import org.moire.ultrasonic.api.subsonic.SubsonicError.IncompatibleServerProtocolVersion
+import org.moire.ultrasonic.api.subsonic.SubsonicError.RequestedDataWasNotFound
+import org.moire.ultrasonic.api.subsonic.SubsonicError.RequiredParamMissing
+import org.moire.ultrasonic.api.subsonic.SubsonicError.TokenAuthNotSupportedForLDAP
+import org.moire.ultrasonic.api.subsonic.SubsonicError.TrialPeriodIsOver
+import org.moire.ultrasonic.api.subsonic.SubsonicError.UserNotAuthorizedForOperation
+import org.moire.ultrasonic.api.subsonic.SubsonicError.WrongUsernameOrPassword
+import org.moire.ultrasonic.service.SubsonicRESTException
 
 /**
  * Extension for [SubsonicRESTException] that returns localized error string, that can used to
@@ -20,19 +20,19 @@ import org.moire.ultrasonic.service.parser.SubsonicRESTException
  */
 fun SubsonicRESTException.getLocalizedErrorMessage(context: Context): String =
         when (error) {
-            GENERIC -> context.getString(R.string.api_subsonic_generic, message)
-            REQUIRED_PARAM_MISSING -> context.getString(R.string.api_subsonic_param_missing)
-            INCOMPATIBLE_CLIENT_PROTOCOL_VERSION -> context
+            is Generic -> context
+                    .getString(R.string.api_subsonic_generic, (error as Generic).message)
+            RequiredParamMissing -> context.getString(R.string.api_subsonic_param_missing)
+            IncompatibleClientProtocolVersion -> context
                     .getString(R.string.api_subsonic_upgrade_client)
-            INCOMPATIBLE_SERVER_PROTOCOL_VERSION -> context
+            IncompatibleServerProtocolVersion -> context
                     .getString(R.string.api_subsonic_upgrade_server)
-            WRONG_USERNAME_OR_PASSWORD -> context.getString(R.string.api_subsonic_not_authenticated)
-            TOKEN_AUTH_NOT_SUPPORTED_FOR_LDAP -> context
+            WrongUsernameOrPassword -> context.getString(R.string.api_subsonic_not_authenticated)
+            TokenAuthNotSupportedForLDAP -> context
                     .getString(R.string.api_subsonic_token_auth_not_supported_for_ldap)
-            USER_NOT_AUTHORIZED_FOR_OPERATION -> context
+            UserNotAuthorizedForOperation -> context
                     .getString(R.string.api_subsonic_not_authorized)
-            TRIAL_PERIOD_IS_OVER -> context.getString(R.string.api_subsonic_trial_period_is_over)
-            REQUESTED_DATA_WAS_NOT_FOUND -> context
+            TrialPeriodIsOver -> context.getString(R.string.api_subsonic_trial_period_is_over)
+            RequestedDataWasNotFound -> context
                     .getString(R.string.api_subsonic_requested_data_was_not_found)
-            else -> context.getString(R.string.api_subsonic_unknown_api_error)
         }
diff --git a/ultrasonic/src/main/res/values-es/strings.xml b/ultrasonic/src/main/res/values-es/strings.xml
index 63726c43..e43aa0c3 100644
--- a/ultrasonic/src/main/res/values-es/strings.xml
+++ b/ultrasonic/src/main/res/values-es/strings.xml
@@ -430,7 +430,6 @@
     <string name="api.subsonic.param_missing">Falta el parámetro requerido.</string>
     <string name="api.subsonic.requested_data_was_not_found">No se encontraron los datos solicitados.</string>
     <string name="api.subsonic.trial_period_is_over">El período de prueba ha terminado.</string>
-    <string name="api.subsonic.unknown_api_error">Error de api desconocido.</string>
     <string name="api.subsonic.upgrade_client">Versiones incompatibles. Por favor actualiza la aplicación de Android UltraSonic.</string>
     <string name="api.subsonic.upgrade_server">Versiones incompatibles. Por favor actualiza el servidor de Subsonic.</string>
 
diff --git a/ultrasonic/src/main/res/values-fr/strings.xml b/ultrasonic/src/main/res/values-fr/strings.xml
index 551a4d56..936b85f1 100644
--- a/ultrasonic/src/main/res/values-fr/strings.xml
+++ b/ultrasonic/src/main/res/values-fr/strings.xml
@@ -430,7 +430,6 @@
     <string name="api.subsonic.param_missing">Param nécessaire manquant.</string>
     <string name="api.subsonic.requested_data_was_not_found">Les données demandées n\'ont pas été trouvées.</string>
     <string name="api.subsonic.trial_period_is_over">La période d\'essai est terminée.</string>
-    <string name="api.subsonic.unknown_api_error">Erreur d\'api inconnue.</string>
     <string name="api.subsonic.upgrade_client">Versions incompatible. Veuillez mette à jour l\'application Android UltraSonic.</string>
     <string name="api.subsonic.upgrade_server">Versions incompatible. Veuillez mette à jour le serveur Subsonic.</string>
 
diff --git a/ultrasonic/src/main/res/values-hu/strings.xml b/ultrasonic/src/main/res/values-hu/strings.xml
index 168332d2..8ed1f179 100644
--- a/ultrasonic/src/main/res/values-hu/strings.xml
+++ b/ultrasonic/src/main/res/values-hu/strings.xml
@@ -430,7 +430,6 @@
     <string name="api.subsonic.param_missing">A szükséges param hiányzik.</string>
     <string name="api.subsonic.requested_data_was_not_found">A keresett adatokat nem találtuk.</string>
     <string name="api.subsonic.trial_period_is_over">A próbaidő vége.</string>
-    <string name="api.subsonic.unknown_api_error">Ismeretlen api hiba.</string>
     <string name="api.subsonic.upgrade_client">Nem kompatibilis verzió. Kérjük, frissítse az UltraSonic Android alkalmazást!</string>
     <string name="api.subsonic.upgrade_server">Nem kompatibilis verzió. Kérjük, frissítse a Subsonic kiszolgálót!</string>
 
diff --git a/ultrasonic/src/main/res/values-pt-rBR/strings.xml b/ultrasonic/src/main/res/values-pt-rBR/strings.xml
index d55a773a..9ef2d86b 100644
--- a/ultrasonic/src/main/res/values-pt-rBR/strings.xml
+++ b/ultrasonic/src/main/res/values-pt-rBR/strings.xml
@@ -430,7 +430,6 @@
     <string name="api.subsonic.param_missing">O parâmetro requerido está faltando.</string>
     <string name="api.subsonic.requested_data_was_not_found">Os dados solicitados não foram encontrados.</string>
     <string name="api.subsonic.trial_period_is_over">O período de avaliação acabou.</string>
-    <string name="api.subsonic.unknown_api_error">Erro de api desconhecido.</string>
     <string name="api.subsonic.upgrade_client">Versões incompativeis. Atualize o aplicativo UltraSonic para Android.</string>
     <string name="api.subsonic.upgrade_server">Versões incompativeis. Atualize o servidor UltraSonic.</string>
 
diff --git a/ultrasonic/src/main/res/values-pt/strings.xml b/ultrasonic/src/main/res/values-pt/strings.xml
index 0afe06c6..4f8da965 100644
--- a/ultrasonic/src/main/res/values-pt/strings.xml
+++ b/ultrasonic/src/main/res/values-pt/strings.xml
@@ -430,7 +430,6 @@
     <string name="api.subsonic.param_missing">O parâmetro requerido está faltando.</string>
     <string name="api.subsonic.requested_data_was_not_found">Os dados solicitados não foram encontrados.</string>
     <string name="api.subsonic.trial_period_is_over">O período de avaliação acabou.</string>
-    <string name="api.subsonic.unknown_api_error">Erro de api desconhecido.</string>
     <string name="api.subsonic.upgrade_client">Versões incompativeis. Atualize o aplicativo UltraSonic para Android.</string>
     <string name="api.subsonic.upgrade_server">Versões incompativeis. Atualize o servidor UltraSonic.</string>
 
diff --git a/ultrasonic/src/main/res/values/strings.xml b/ultrasonic/src/main/res/values/strings.xml
index 2a1905e7..9a1d99e9 100644
--- a/ultrasonic/src/main/res/values/strings.xml
+++ b/ultrasonic/src/main/res/values/strings.xml
@@ -432,7 +432,6 @@
     <string name="api.subsonic.param_missing">Required param is missing.</string>
     <string name="api.subsonic.requested_data_was_not_found">Requested data was not found.</string>
     <string name="api.subsonic.trial_period_is_over">Trial period is over.</string>
-    <string name="api.subsonic.unknown_api_error">Unknown api error.</string>
     <string name="api.subsonic.upgrade_client">Incompatible versions. Please upgrade UltraSonic Android app.</string>
     <string name="api.subsonic.upgrade_server">Incompatible versions. Please upgrade Subsonic server.</string>