Reply to Stephen's Post: Hi Stephen,
Initially the suggestion seemed to work, then it started up again. I will have to check my system to see that I don't have some small utility that is triggering it. Before I retired I provided desktop support etc for both Macs and PCs, but am not as conversant with OSX as I was with OS9 and prior. For example, I don't know the equivalent under OSX for rebooting with all extensions off as a means of eliminating problems.
regards, Patricia Mitchell