Unable to start DSC Shared Memory

[JTMX39]

I am running LabView 7.0 (I know its an older setup), with DSC and Lookout OPC to do Serial communications to an Omron PLC. I needed to update the Ni-DAQ because the PCI-6220 board needs the driver. I upgraded to NI-DAQ 7.5 and now a get the Unable to start the DSC Shared Memory Manager Service. I have uninstalled the DSC and reinstalled it with no change. I found in the discussion boards that I need nidscsm.exe in the windows\system32 folder but it is not there. I am running Windows XP.

I have 2 setups like this. 1 PC still connects to the PLC even though the error pops up, another PC will not connect at all, lights blink but then comms timeout error. 

Thanks!

[JTMX39]

I uninstall all the NI software. Installed LV 7.0, DSC, Lookout OPC. I get connected right away to my PLC no problems or error. NIDSCSM.COM is loaded as a service and running as a process.

When NI-DAQ is upgraded, so i can run my PCI-6220 card, it trashes all the OPC stuff and the communications no longer works. Is there just a driver I can install for the PCI-6220 or does MAX have to be upgraded also? Thanks!

[Hueter]

NI DAQ is now out of date, if possible you should use DAQmx instead. According to this chart, you can use any version before DAQmx 8.1. This new driver should work better with DSC. If you need some help converting your code check out this tutorial:Transition from Traditional NI-DAQ to NI-DAQmx in LabVIEW

[JTMX39 · Accepted solution]

Sorry maybe I had my names wrong. It was DAQ-Mx that I upgraded, to v.8.1 and that's when it messes up the OPC communications. I did find out if I install the DAQ-Mx without the OPC option checked that it still deletes the NIDSCSM.COM as a service but I can still use the OPC serial communications. Strange....

[Hueter]

Did you reinstall DSC, after you installed DAQmx 8.1?

[JTMX39]

Yes, it didn't fix it either. Its seems ok as long as I don't install the OPC Server with the newer DAQ-Mx and then I go back and re-install the NIDSCSM.COM as a service.