Quite vague... Since you are on NT4 and they just released the update, I'll skip the normal "a desktop program doesn't run under terminal services" stuff. A problem with "system calls" often involves calls to the Windows Native API, which changed in some incompatible ways between NT and the more recent OS's. It would be unusual for an application program to use the Native API instead Windows API, which would be compatible - but who knows? Assuming that their software was working on NT prior to the upgrade, it really isn't that hard to make it work both ways -- however they probably have no incentive to do so. By the way, I am unaware of anything Citrix would be doing to cause a "system call" issue. tim Timothy R. Mangan Founder TMurgent Technologies tmangan@xxxxxxxxxxxx www.tmurgent.com +1 781-492-0403 -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On Behalf Of Andrew Rogers Sent: Tuesday, August 19, 2003 4:42 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] NT4+Citrix Development Question There's not been many dev questions, but hopefully someone might have some experience on this.. We're working with a company called Star who have recently released an update to their time and fees software which falls over horribly on NT4+Citrix (we use 1.8). Through various other contacts of theirs, they've managed to narrow the problem down to being the fact that Citrix apparently doesn't handle the system calls (specifically as to what users are online) as well as plain TS does, somehow.. A bit vague I know, but is anyone able to shed even a tiny ray of light? Andrew --o-- ******************************************************** 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 ******************************************************** 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