Hi all, I know it is Friday afternoon and you are ready to go home, but has anyone got any ideas on this. I have had an app using dde client running for 2.5 years(the server is Wonderware dde I/O server for accessing PLC data). Recently I have had to increase the number of the items that I am getting from a topic. Since I have attempted this I have run into problems with on machine where the Dde conversation closes for no apparent reason. I have written a simulation server for testing and everything works well. The application works on another PC which was ghosted off the first, so all the Dll's etc are identical just the setting for the server is slightly different as to which PLC it monitoring. Thank you Maurice Butler Like Magic Ltd Systems Engineer P.O. Box 89 025 273 9248 Temuka --------------------------------------------------------------------------- New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED] Website: http://www.delphi.org.nz