diff --git a/src/main/java/org/rundeck/client/api/model/ErrorResponse.java b/src/main/java/org/rundeck/client/api/model/ErrorResponse.java
index 2b5a2b3a..f144c331 100644
--- a/src/main/java/org/rundeck/client/api/model/ErrorResponse.java
+++ b/src/main/java/org/rundeck/client/api/model/ErrorResponse.java
@@ -18,10 +18,9 @@
 
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import org.rundeck.client.util.Xml;
-import org.simpleframework.xml.Attribute;
-import org.simpleframework.xml.Element;
-import org.simpleframework.xml.Path;
-import org.simpleframework.xml.Root;
+import org.simpleframework.xml.*;
+
+import java.util.List;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
 @Root(strict = false)
@@ -39,10 +38,14 @@ public class ErrorResponse implements ErrorDetail {
     @Path("error")
     public String errorCode;
 
-    @Element
+    @Element(required = false)
     @Path("error")
     public String message;
 
+    @Path("error")
+    @ElementList(entry = "message", required = false)
+    public List<String> messages;
+
     public String toCodeString() {
         if (null != errorCode) {
             return String.format(
@@ -61,7 +64,11 @@ public String getErrorCode() {
 
     @Override
     public String getErrorMessage() {
-        return message != null ? message : error;
+        return message != null ? message :
+               messages != null ? messages.size() == 1
+                                  ? messages.get(0)
+                                  : messages.toString()
+                                : error;
     }
 
     @Override
diff --git a/src/test/groovy/org/rundeck/client/api/model/ErrorResponseSpec.groovy b/src/test/groovy/org/rundeck/client/api/model/ErrorResponseSpec.groovy
index 7277e8ec..c0c1d29b 100644
--- a/src/test/groovy/org/rundeck/client/api/model/ErrorResponseSpec.groovy
+++ b/src/test/groovy/org/rundeck/client/api/model/ErrorResponseSpec.groovy
@@ -7,6 +7,7 @@ import retrofit2.Retrofit
 import retrofit2.converter.jackson.JacksonConverterFactory
 import retrofit2.converter.simplexml.SimpleXmlConverterFactory
 import spock.lang.Specification
+import spock.lang.Unroll
 
 import java.lang.annotation.Annotation
 
@@ -15,6 +16,7 @@ import java.lang.annotation.Annotation
  * @since 12/13/17
  */
 class ErrorResponseSpec extends Specification {
+    @Unroll
     def "xml parse code not required"() {
         given:
         def retrofit = new Retrofit.Builder().baseUrl('http://test').
@@ -34,6 +36,8 @@ class ErrorResponseSpec extends Specification {
         result.errorCode == code
         result.error == error
         result.message == message
+        result.messages == null
+        result.errorMessage == message
         result.apiVersion == version
 
         where:
@@ -51,4 +55,88 @@ class ErrorResponseSpec extends Specification {
                 'blah'  | 20
 
     }
+
+    @Unroll
+    def "xml parse multi message"() {
+        given:
+        def retrofit = new Retrofit.Builder().baseUrl('http://test').
+                addConverterFactory(SimpleXmlConverterFactory.create()).
+                build()
+
+        when:
+        Converter<ResponseBody, ErrorResponse> converter = retrofit.responseBodyConverter(
+                ErrorResponse.class,
+                [] as Annotation[],
+                );
+        ErrorResponse result = converter.convert(ResponseBody.create(MediaType.parse('application/xml'), xmlText))
+
+        then:
+
+        result != null
+        result.errorCode == code
+        result.error == error
+        result.messages == messages
+        result.errorMessage == messages.toString()
+        result.apiVersion == version
+
+        where:
+        xmlText                                                                                                      |
+                code  |
+                error  |
+                messages          |
+                version
+        '<result error=\'true\' apiversion=\'20\'><error ' +
+                'code=\'xyz\'><messages><message>blah</message><message>blah2</message></messages></error></result>' |
+                'xyz' |
+                'true' |
+                ['blah', 'blah2'] |
+                20
+
+    }
+
+    def "json parse with multiple messages"() {
+        given:
+        def retrofit = new Retrofit.Builder().baseUrl('http://test').
+                addConverterFactory(JacksonConverterFactory.create()).
+                build()
+
+        when:
+        Converter<ResponseBody, ErrorResponse> converter = retrofit.responseBodyConverter(
+                ErrorResponse.class,
+                [] as Annotation[],
+                );
+        ErrorResponse result = converter.convert(
+                ResponseBody.create(MediaType.parse('application/json'), jsonText)
+        )
+
+        then:
+
+        result != null
+        result.errorCode == code
+        result.error == error
+        result.message == message
+        result.messages == messages
+        result.apiVersion == version
+
+        where:
+        jsonText                                                                               |
+                code                |
+                error  |
+                message     |
+                messages   |
+                version
+        '{"error":true,"apiversion":21,"errorCode":"test","messages":["a","b"]}'               |
+                'test'              |
+                'true' |
+                null        |
+                ['a', 'b'] |
+                21
+        '{"error":true,"apiversion":21,"errorCode":"api.error.unknown","message":"A message"}' |
+                'api.error.unknown' |
+                'true' |
+                'A message' |
+                null       |
+                21
+
+    }
 }