After the database server had a tiny hickup I am confronted with "JSON is incorrect" messages when trying to access some records in my user-set. Additionaly the NEW button (on the user admin form) triggers the message too. IN the log I get these org.codehaus.jackson.JsonGenerationException: Can not write a field name, expecting a value at org.codehaus.jackson.impl.JsonGeneratorBase._reportError(JsonGeneratorBase.java:375) at org.codehaus.jackson.impl.JsonGeneratorBase.writeFieldName(JsonGeneratorBase.java:203) at kq.a(SourceFile:97) at kq.a(SourceFile:89) at ju.a(SourceFile:313) at ju.a(SourceFile:230) at ju.processRequest(SourceFile:174) at fF.a(SourceFile:71) at com.mendix.core.MxRuntime.processRequest(SourceFile:938) at com.mendix.m2ee.server.handler.RuntimeHandler.handle(RuntimeHandler.java:42) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) at org.eclipse.jetty.server.Server.handle(Server.java:334) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:559) at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1007) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:747) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:203) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:406) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:462) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) at java.lang.Thread.run(Unknown Source) I cant find a usefull hint here on what is wrong... other then the bold marked area. So any suggestions are welcome !