Since some of you use OPC, maybe someone will have an idea what I am doing wrong here.
I have two Windows XP Pro SP1 computers. Both have the following common software installed: MAX 3.0.2.3005 NI-DAQ 7.1.0f1 DAQmx 7.1.0f1 Server Explorer 2.4.1 (National Instruments) I have some virtual channels set up for NI-DAQ, just to make sure DAQ OPC has something to look at. In Server Explorer, when I try to browse the OPC Servers on the remote computer, I consistently get the Windows error message "Unable to connect to \\<remote computer name>! Make sure that this computer is on the network, has remote administration enabled, and that both computers are running the remote registry service." If I try to view the registry keys on the remote computer using 'regedt32', I can not view anything below HKEY_LOCAL_MACHINE\SYSTEM, even though I have modified security for the following keys to make sure DCOM should work. "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurePipeServers ..." I gave "Everyone" full access to these keys just to be sure security wouldn't be a problem. Does anyone know if there is anything peculiar about Windows XP that might make DAQ OPC setup difficult (or maybe just different). I've done all the DCOM setup stuff that National Instruments recommends. I am using the Administrator account on both computers (same password for both). I am trying to use the simplest possible settings, and it just doesn't seem to want to work! A National Instruments engineer has been trying to help me as well, and I seem to have him stumped. Thanks for any ideas! John Howard
