Error in QbE Dataset

I'm trying to create a mobile table.

I created a dataset with QBE engine and I can preview it in dataset. It works correct.

But when i tried to use it in mobile table It freezed in loading screen.

I create same dataset with Query and it works in mobile table i can see it.

Can be any problem with Mobile Engine + QBE Query Dataset?

My SpagoBIMObileEngine log:

06 Tem 2012 14:51:51,061 ERROR it.eng.spagobi.engine.mobile.table.service.ExecuteMobileTableAction.doService:131 - Unable to execute table document
it.eng.spagobi.utilities.exceptions.SpagoBIServiceException: An unpredicted error occurred while executing Impossible to serialize datastore service.
	at it.eng.spagobi.engine.mobile.table.service.ExecuteMobileTableAction.doService(ExecuteMobileTableAction.java:112)
	at it.eng.spagobi.commons.services.AbstractSpagoBIAction.service(AbstractSpagoBIAction.java:74)
	at it.eng.spago.dispatching.action.ActionCoordinator.invokeServiceBusiness(ActionCoordinator.java:209)
	at it.eng.spago.dispatching.action.ActionCoordinator.service(ActionCoordinator.java:158)
	at it.eng.spago.dispatching.httpchannel.AdapterHTTP.service(AdapterHTTP.java:415)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at it.eng.spagobi.utilities.filters.SpagoBIAccessFilter.doFilter(SpagoBIAccessFilter.java:200)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
	at java.util.ArrayList.elementData(ArrayList.java:371)
	at java.util.ArrayList.get(ArrayList.java:384)
	at it.eng.spagobi.tools.dataset.common.datastore.Record.getFieldAt(Record.java:41)
	at it.eng.spagobi.engine.mobile.table.serializer.MobileDatasetTableSerializer.write(MobileDatasetTableSerializer.java:64)
	at it.eng.spagobi.engine.mobile.table.service.ExecuteMobileTableAction.doService(ExecuteMobileTableAction.java:101)
	... 20 more

Hi,
no mobile works as well with QbE datasets, because it analyzes just the resultset.
The problem here seems that it doesn't find the value of the resultset for one extracted field. If you can post a screenshot of the dataset preview would be helpful!
Thanks

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