Hi,
when I execute a jasper report from design studio I have the error:
Error: JasperReport.ERROR_0003 - JDBC driver not specified. (org.pentaho.platform.plugin.action.jasperreports.JasperReportsComponent) Debug: Starting execute of SIACO//Jasper.xaction (org.pentaho.platform.engine.services.solution.SolutionEngine)
Debug: Getting runtime context and data (org.pentaho.platform.engine.services.solution.SolutionEngine)
Debug: Loading action sequence definition file (org.pentaho.platform.engine.services.solution.SolutionEngine)
Debug: audit: instanceId=e4bb231c-47e0-11df-aab8-29ff5376be5c, objectId=org.pentaho.platform.engine.services.runtime.RuntimeContext, messageType=action_sequence_start (org.pentaho.platform.engine.services.runtime.RuntimeContext)
Debug: validateComponent validating component JasperReportsComponent (org.pentaho.platform.engine.services.runtime.RuntimeContext)
Debug: Component alias JasperReportsComponent will be resolved by the platform (org.pentaho.platform.engine.services.runtime.RuntimeContext)
Debug: Validating component for action Jasper.xaction (org.pentaho.platform.plugin.action.jasperreports.JasperReportsComponent)
Debug: imageUrl is "{0}"getImage?image= (org.pentaho.platform.plugin.action.jasperreports.JasperReportsComponent)
Debug: imageDir is "{0}"system/tmp (org.pentaho.platform.plugin.action.jasperreports.JasperReportsComponent)
Debug: removeEmptyRows is {0}true (org.pentaho.platform.plugin.action.jasperreports.JasperReportsComponent)
Error: JasperReport.ERROR_0003 - JDBC driver not specified. (org.pentaho.platform.plugin.action.jasperreports.JasperReportsComponent)
Error: RuntimeContext.ERROR_0006 - Action components do not validate: Jasper.xaction (org.pentaho.platform.engine.services.runtime.RuntimeContext)
Error: SolutionEngine.ERROR_0006 - Action sequence validation failed (org.pentaho.platform.engine.services.solution.SolutionEngine)


I don't understand because with Ireport the report is ok.
Can you help me ?

Giovanni