I have SCO Openserver 5.0 supporting ON-Line 7.23 and have sucessfully configured 2 separate instances. However, no matter what I tweek, I fail miserably with a Fatal shared memory initialization error when trying to create a 3rd instance. I can only ever get a perm of 2 out of 3 instances online at any one point in time. Is there a limitation I'm not aware of? Any clues greatly appreciated.