27001 error

Like many folk, I too had read the manual and knew about poll threads and blah blah (all suggestions greatly received nonetheless)! However, it was noticed by one or two that our 27001 error was happening with very few sessions and rightly pointed to a possible Unix resource problem. Turns out that the Informix 7.31 installation in question was fine BUT at some point in time someone had probably executed chown informix * in the $INFORMIXDIR/bin dir! Thus, certain processes and oninit especially did not have root permissions on execution, (i.e use of SUID SGID but wrong ownership: i.e ownership on file given to informix instead of root) IDSfiles file was good for what the file permissions and ownership should be exactly. So, changing the proper files back to root owner has resolved our 27001 problem with some 1000 sessions running successfully as a test. Ta for the help, I'm off to see if I can get some petrol for my wee buggy; the UK has come to something of a standstill! W.