eloped app under win95 and running perfectly. Transfered program to win2000 using DAQ-24 pcmcia card receive error when attempting the following command in delphi 5 formUnlock.CWDIO1.Ports.Item(0).SingleWrite(0) receive the error 'Invalid Index' any ideas?AnnoDomini2,
You may want to check if the device number under the Properties for that control is set up to the same one that is set up in MAX. I have seen this error in Visual Basic and most of the time, all you need to do is select the appropriate device number.
Good luck with your application!