Thanks Nika for your reply.
I had created a seperate user, assigned all roles to that user
Running Preview I get following error:
Start Report Execution
Compiling report......DONE
Setting Data Adapter...DONE
Setting Virtualizer...DONE
Filling Report........ERROR
Report Execution Finished.
net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.JRException: java.lang.NullPointerException
at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:468)
at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$18(ReportControler.java:443)
at com.jaspersoft.studio.editor.preview.view.control.ReportControler$4.run(ReportControler.java:335)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: net.sf.jasperreports.engine.JRException: java.lang.NullPointerException
at com.jaspersoft.studio.server.domain.conn.DomainQueryExecuter.createDatasource(DomainQueryExecuter.java:197)
at net.sf.jasperreports.engine.fill.JRFillDataset.createQueryDatasource(JRFillDataset.java:1114)
at net.sf.jasperreports.engine.fill.JRFillDataset.initDatasource(JRFillDataset.java:691)
at net.sf.jasperreports.engine.fill.JRBaseFiller.setParameters(JRBaseFiller.java:1314)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:931)
at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFiller.run(BaseFillHandle.java:120)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222)
at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129)
at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl.parse(Unknown Source)
at org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
at org.apache.axis.Message.getSOAPEnvelope(Message.java:435)
at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206)
at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
at org.apache.axis.client.Call.invoke(Call.java:2767)
at org.apache.axis.client.Call.invoke(Call.java:2443)
at org.apache.axis.client.Call.invoke(Call.java:2366)
at org.apache.axis.client.Call.invoke(Call.java:1812)
at com.jaspersoft.studio.server.domain.ws.DomainServicesSoapBindingStub.executeDomainQuery(DomainServicesSoapBindingStub.java:293)
at com.jaspersoft.studio.server.domain.protocol.Soap.executeQuery(Soap.java:59)
at com.jaspersoft.studio.server.domain.protocol.DomainProxy.executeQuery(DomainProxy.java:39)
at com.jaspersoft.studio.server.domain.DomainManager.executeQuery(DomainManager.java:85)
at com.jaspersoft.studio.server.domain.conn.DomainQueryExecuter.createDatasource(DomainQueryExecuter.java:194)
... 6 more