Errors dropping temp table space

I have this problem, and Informix Italy did not give me no answer (I've been waiting since 50 days). When bringing OnLine 7.20 on line, in the log file I see a series of errors like this: Assert Failed: WARNING! pthdrpage:ptalloc:bad partn page Who: Session(........) Thread(.........)Results: Cannot use TBLSpace page for TBLSpace 1049655 Action: Run 'oncheck -pt 1049655' See Also: /tmp/af.d35bc Running oncheck -pt I have a: 'Error opening TBLSpace'. Looking in the af* file I see that it concerns some temp tables created by the users with the 'create temp table'. These table should be destroyed at the end of each user's session. Some tables perhaps have problems and Informix is not able to have back the space allocated for them (this is what I think). When the users' session are ended, Informix doesn't see anymore these tables and so oncheck -pt can not be succesfull. All the other oncheck I perform are OK (-cI,-cc,-cD,-ce,-cr). Each time I bring Informix on line I have the same errors. I CAN NOT drop and recreate the dbspace (it is rootdbspace). Now I have created a tempdbs to store these temp table. But How can I recover this space in rootdbs and stop with these errors ??? Thanks a lot in advance Marco Traini