We are getting CX_SY_DYNAMIC_OSQL_SEMANTICS error

When we run BEx queries (not all), we are getting a dump error shown above with the name of a temporary table.

The table exists in the data dictionary but not in the oracle database. We have been running prepare for an eminent upgrade, but we have been told that that can not be causing this problem.

we have moved no changes into our Production environment.

any help would be greatly appreciated.