The calls I don't actually know - in the logfile the program creates, there's various function looking names, but I suspect they're functions in the program.. Its a commercial program so they may or may not let me know, but it can't hurt to ask, I'll get back to you! Tim - it does seem odd that theyve suddenly hit this.. they are working on getting around it (that company has the best support ive come across, ever, in any industry!) so it's just a matter of time. I think theyre more hinting at the amount of calls theyre making, along with memory accesses. Chances are I'll never find out 100% what was doing it, but I'm sure they will :) Andrew --o-- >>> Brian.Lilley@xxxxxxxxxxxxx 19/08/03 09:44:37 >>> Andrew, what kind of calls fail?? ******************************************************** This Week's Sponsor: RES PowerFuse, The Management Framework for Windows Eliminate Multiple Tools, Multiple Support Channels and Multiple Costs Manage, Control, and Secure an Entire Windows environment with Ease, including Real-time Reporting and Documenting Components Validate a Meaningful ROI on All of your IT Investments with RES PowerFuse. http://www.respowerfuse.com/ ********************************************************** Useful Thin Client Computing Links are available at: http://thethin.net/links.cfm For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm