Report Generation nullPointerException on IE8 / Google Chrome

mmah

I have a machine which uses IE8 (with ChromeFrame plugin) and Google Chrome browsers installed in it. During the first run of generating a report, the report is generated successfully. However, in subsequent iterations of the same report screen, the launch screen will not allow opening of the same report.

Also, while trying to launch other reports in IE8 after the first one, I am getting a null pointer exception whenever I try launching it. Part of the stacktrace shown is:

error in /reports...
WebReport.java (doGet) line 129

The null pointer exception seems to be pointing in particular to

String format = req.getParameter("__format");

if(format.equals("pdf")) {

This doesn't happen when running in Firefox.

The reporting engine used is 2.5RC2. I am unsure whether the problem is due to IE8 and the ChromeFrame plugin used. We used that plugin as a way to improve our application performance.

Please advise / help on this.

Thanks