I've installed jasper studio plugin into my eclipse, and everything works. Then I've gone to Data Adapter wizard and created new data adapter for my first report. I select postgresql driver, put the url, password, user, jar, etc... I've tried test button and tells me "succesful" Then in the report I selected "Dataset & Query Dialog" selected data adapter postgresql... and try "Get Fields" and returns this error: *********************************************************************** Exception, if you want to see more information look into details Reason: Parameter "REPORT_PARAMETERS_MAP" does not exist [Details>>] [ OK ] ************************************************************************ If I press on details: net.sf.jasperreports.engine.JRRuntimeException: Parameter "REPORT_PARAMETERS_MAP" does not exist. at net.sf.jasperreports.engine.query.JRAbstractQueryExecuter.getValueParameter(JRAbstractQueryExecuter.java:606) at net.sf.jasperreports.engine.query.JRAbstractQueryExecuter.parameterHasValue(JRAbstractQueryExecuter.java:491) at net.sf.jasperreports.engine.query.JRAbstractQueryExecuter.getBooleanParameter(JRAbstractQueryExecuter.java:530) at net.sf.jasperreports.engine.query.JRAbstractQueryExecuter.getBooleanParameterOrProperty(JRAbstractQueryExecuter.java:559) at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.<init>(JRJdbcQueryExecuter.java:124) at com.jaspersoft.studio.data.jdbc.JDBCFieldsProvider.getFields(JDBCFieldsProvider.java:63) at com.jaspersoft.studio.data.jdbc.JDBCDataAdapterDescriptor.getFields(JDBCDataAdapterDescriptor.java:82) at com.jaspersoft.studio.property.dataset.dialog.DataQueryAdapters$5$1.run(DataQueryAdapters.java:256) at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121) What I'm doing wrong? Sorry for my bad english.