SET EXPLAIN Error

I am getting the following two errors when I issue a SET EXPLAIN command: 534: Cannot open EXPLAIN output file. 134: ISAM error: no more locks I am running the command via DB-Access and ISQL. I have tried both online and command line. I have verified that there are available locks within Online, and that I can create a file in the working directory. I am certain it is a file permission error, as the UNIX root user DOES NOT get the error. I have tried the following: 1. su root from user Informix - still bombs. 2. Run as Informix - bombs. 3. Run as other user -bombs. 4. Set HOME directory to /tmp - bombs. 5. su informix from root - bombs. 6. Set absolute INFORMIXDIR path rather than symbolic link - bombs. 7. Review INFORMIXDIR/bin permissions - looks OK. 8. Review available space on drives - OK. 9. Review UNIX semaphores - OK. I am near the edge. Informix support hasn't been able to help so far. Any comments or suggestions are appreciated. My platform: Silicon Graphics Challenge XL running IRIX 5.3 Online DSA 7.12.uc3 INFORMIX-SQL 6.03.UC1 ESQL/C 7.12.UC1 TIA, ------------------------------------------------------------------- Jeff Craig | dbINTELLECT Technologies, Inc. Senior Consultant | Golden, CO | (303) 275-6954 ext. 8008 | email: settler@dbintellect.com | fax: (303) 275-2134 -------------------------------------------------------------------