Add error message.

src/main/kotlin/builder/ResourceBuilder.kt

@@ -50,11 +50,11 @@ class ResourceBuilder(
             when (val id = source[config.uri]) {
                 is String -> recordId = id
                 is Int -> recordId = id.toString()
-                is JsonArray<*> -> "Found multiple values in the field '${config.uri}' for identifiers: ${
+                is JsonArray<*> -> errorMessages.add("Found multiple values in the field '${config.uri}' for identifiers: ${
                     id.joinToString(
                         ", "
                     )
-                }."
+                }.")
                 null -> errorMessages.add("The value for id is 'null' in field '${config.uri}'.")
                 else -> errorMessages.add("Invalid value '$id' for id in field '${config.uri}'.")
             }

src/test/kotlin/ch/memobase/test/LocalTestRun.kt

@@ -34,9 +34,9 @@ import org.junit.jupiter.api.TestInstance
 class LocalTestRun {
     private val log = LogManager.getLogger(this::class.java)
     private val headerMetadata = HeaderMetadata(
-        "swi-001",
+        "ati-002",
         "1",
-        "swi",
+        "ati",
         false,
         "record",
         "identifierMain",
@@ -46,9 +46,9 @@ class LocalTestRun {
     @Test
     @Disabled
     fun `test local folder`() {
-        val folder = "/home/jonas/memobase/data/swi-001"
-        val inputFolder = "/home/jonas/memobase/data/test-swi/step-2"
-        val outputFolder = "/home/jonas/memobase/data/test-swi/step-3"
+        val folder = "/home/jonas/memobase/data/ati-002"
+        val inputFolder = "/home/jonas/memobase/data/test-ati/step-2"
+        val outputFolder = "/home/jonas/memobase/data/test-ati/step-3"
         val mappingFile = "/config/mapping.yml"
         val klaxon = Klaxon()
         val configurationParser = MappingConfigurationParser(File(folder + mappingFile).readBytes())