Hi All, I have some reports that are working fine in iReport. They are not doing anything very fancy, just taking an XML Data source and generating some proposal documents based on that. When I try to run them in JasperSoft Studio I get the following error pasted below. The report uses groovy as it's language, and all the report properties seem to be set the same as in iReport as far as I can tell, and the DataAdapter uses the same Select expression and file. What could be happening? net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression for source text: ((net.sf.jasperreports.engine.data.JRXmlDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("cartLine")at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:524)at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$20(ReportControler.java:499)at com.jaspersoft.studio.editor.preview.view.control.ReportControler$5.run(ReportControler.java:380)at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)Caused by: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression for source text: ((net.sf.jasperreports.engine.data.JRXmlDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("cartLine")at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:291)at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:618)at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:586)at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:1020)at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:460)at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:351)at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:281)at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:504)at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2026)at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:752)at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:259)at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:119)at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:558)at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:119)at java.lang.Thread.run(Thread.java:745)Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'net.sf.jasperreports.engine.JREmptyDataSource@6830ad8b' with class 'net.sf.jasperreports.engine.JREmptyDataSource' to class 'net.sf.jasperreports.engine.data.JRXmlDataSource'at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:360)at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:599)at GammaMain_1460740202165_624679.evaluate(calculator_GammaMain_1460740202165_624679:306)at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:277)... 14 more