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CM4000PL giving a 'comms loss' error message when trying to debug the program?

When attempting to use CM4000PL a 'comms loss' is received.

Product Line
All CM4000 Series
All SMS verisons

Communication Errors

CM4000PL cannot communicate with the CM4000 while the SMS system is Online. Take the SMS system offline, then one should be able to download a program to debug or etc.

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