I tried to open the ppt format report with ppt viewer 2007 but a "this is not a valid ppt file" error occurred. I attached the report in attachment. Please advise.
Can you please try to do it with ppt 2007 viewer? I tried it with ppt 2003 and could open it without problem. I am suspecting if it dosn't work with pure viewer.
I couldn't open it straight to 2007 viewer either. To get around the issue, I opened it with PowerPoint 2007 and saved it as a 2007 PowerPoint presentation and it opened in the viewer just fine. You might try the Tribix powerpoint emitter:
What is your BIRT version? If using the latest version, log a bug for this in the bugzilla. If using an older version, try downloading the newest version and seeing if it works any different for you.