Based on Romas's feedback, we had our configuration engineering group check and his configuration is old. They updated it and now he is working. Thanks, Chris ________________________________ From: Roman Podshivalov [mailto:roman.podshivalov@xxxxxxxxx] Sent: Monday, February 11, 2008 3:00 PM To: Grabowy, Chris Cc: Oracle List Subject: Re: Oracle Reports Builder starting with errors... Hi, It looks like you and your DBAs are using standard (provided by Oracle) JDK to load java classes. Developers are more sophisticated in that field and most likely are using newer one. Starting from JDK 1.4.2_05 it is not supported to use slash '/' as class separator and java.lang.NoClassDefFoundError: Illegal name exception will be raised. Check out this thread for more explanation: http://forum.java.sun.com/thread.jspa?forumID=37&threadID=544602 --romas On 2/11/08, Grabowy, Chris <chris.grabowy@xxxxxxxx> wrote: We have a developer that started using Reports Builder 10g and keeps getting errors when starting the tool: REP-0201: Zero or negative block size requested (Definition Manager Memory Subsystem) and then... REP-0069: Internal error java.lang.NullPointerException and then... REP-0069: Internal error java.lang.NoClassDefFoundError: Illegal name: oracle/dss/pds/bibeans/xrpds/XRPDS After OKing those errors he attempts to open a report but continues to receive errors. Myself and other DBAs have been able to start Reports Builder with no errors. We all Citrix into a Windows 2003 box where Reports Builder is installed. Our environment variables match the developers. I poked around Documents and Settings trying to find an Application Data or Local Settings folder related to Reports Builder, but found nothing. I googled and checked Metalink but have found nothing related to receiving these error message when simply trying to start the tool. Help? Ideas? TIA. Chris