We’ve had this same issue with long-running DeskI Reporter with many queries. We found that it was the longer running ones that would generate this error. We checked with our outsourced BO Supplier, and they were unable to advise what it is (they didn’t get anything back from Business Objects).
One thing I’ve found is that if you export the report to WebI (sorry, Infoview) and schedule it to run there then often reports that wouldn’t run for this error on DeskI would work in Infoview.
Here’s a previous post on the same topic.
https://bobj-board.org/t/100155
martin_black 
(BOB member since 2008-03-04)