Federico esto es el resultado del trace
java.lang.NullPointerException
at net.sf.jasperreports.view.JRViewer.setPageIndex(JRViewer.java:1333)
at net.sf.jasperreports.view.JRViewer.loadReport(JRViewer.java:1419)
at net.sf.jasperreports.view.JRViewer.
at net.sf.jasperreports.view.JRViewer.
at org.openXpertya.JasperReport.OXPJRViewer.
at org.openXpertya.JasperReport.OXPJasperViewer.viewReport(OXPJasperViewer.java:29)
at org.openXpertya.JasperReport.MJasperReport.showReport(MJasperReport.java:171)
at org.openXpertya.JasperReport.LaunchArticuloPrecio.createReport(LaunchArticuloPrecio.java:113)
at org.openXpertya.JasperReport.LaunchArticuloPrecio.doIt(LaunchArticuloPrecio.java:52)
at org.openXpertya.process.SvrProcess.process(SvrProcess.java:154)
at org.openXpertya.process.SvrProcess.startProcess(SvrProcess.java:114)
at org.openXpertya.apps.ProcessCtl.startProcess(ProcessCtl.java:527)
at org.openXpertya.apps.ProcessCtl.run(ProcessCtl.java:282)