A bug in a web based BW report with BSP frontend

Hi all,
We are facing an issue with a BW report whose front end is designed using a BSP application created in the BW system. This report is accessed from a java based portal which has a link to one of the pages of BSP application.
The report is a list of contract line items for a particular billing partner, which is the selection criterion. On clicking the report link on portal, users are prompted to select the billing partner. Clicking OK on the partner selection displays multiple contract lines with a check box against each. Users select one or more of the contract lines and click on Print Preview which is link to another BSP page that shows the print preview. After viewing the preview, users can select Back to navigate to the previous page which is the report main page.
The issue is that when user selects some contract lines and selects Print Preview for the first time, none of the selected items is displayed in the preview. When the user selects Back, re-selects the items and chooses print preview again then it is displayed correctly.
The same report works fine in the development system but has the above issue in the quality system. We compared each layout and event handler of each page of the BSP application in dev system with its own copy in the quality system. Both seem to be exactly identical.
We have debugged in both the systems to see the control flow and how data is fetched. When control goes from one of the event handlers to the layout, some internal tables seem to get filled. But we could not locate the logic of this as this seemed to happen outside the BSP application.
Can some one throw some light on where the error can possibly be. Or if anyone can provide some guidance on the control flow of BSP application and what other components might be involved, it will be highly appreciated.
Enjoy SAP...
Regards,
Ketan Dave

HI,
Check here: Re: Web RRI
Happy

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