PowerPlay Data Server could not find a record. (Category)

[BIg Thunder]

Here's the background...I'm running C8 Connection as the front end.  My user's are viewing cubes and reports in PP Web and ultimately authenicatation is created and handled by a directory server in PPES.  The cube has custom views, depending on the groups (Managers vs Sales Reps type of permission hierarchy).

The reports have a couple measures (Revs, Qty, Commission) as the columns, and Product on the rows. 

All reports are selected in Cognos Connection, but rendered in PP Web Explorer (or Adobe).

I execute the report as a Manager, move the order of the measuers, save it, and all is well. (Note: the measures used can be viewed by all groups).

When the Sales Rep opens the original report, the report executes and renders ok.  BUT, when they open the MODIFIED copy of the report, I get an error in the PP Web Explorer window: ' Internal error - request failed "PowerPlay Data Server could not find a record. (Category)" '.  Lastly, if I execute the modified report as PDF, it renders as a PDF -- no problem.

The only thing in Cognos' KB relates to cube builds.  My cube build is fine!

I don't know if it's a PP Web issue or permissions issue, or if it's some weird issue of v7 vs v8.

Any help would be greatly appreciated.