Found out what the problem is and how it happened.
When i installed the Jasper plugin i simply downloaded the version from the Servoy site and installed it.
When i installed 2.0.5 of iReport i renamed the jasperreports.jar in the directory jasperPluginRMI to jasperreports_org.jar and then copied the file jasperreports-2.0.5.jar from the ireport directory and renamed it to jasperreports.jar
If you do this then yoy get the “topPen” error.
If you delete the file jasperreports_org.jar the problem is gone !!!