1972 is the default port, checked. InStudio2 does no work in our environment.

In my case ClientExecutableName is empty when run from Studio. I also run ZW myproc but did not see anyting definitive inside.

I am not sure what exactly does it represent but here is the full value when code is run from Studio 2017: $STACK(0,"PLACE")=zDebugStub+30^%Debugger.System.1 +N. When the same code is run from Terminal the value is $STACK(0,"PLACE")=@ +N1. N and N1 are integers, not sure if always the same.