Code -63 and 'Underdefined Command' Errors

I receive the attached errors when I try to enter the debug mode. The last commands shown are each communication handles. I have not run into this problem before, and am unsure where it originates from. Any guidance for how to troubleshoot would be great.

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After trouble shooting I found that there were two hidden paragraph return key hits within my communication handle variable initial value

Thanks for closing the loop and letting us know the issue.
Tricky to solve. Nice work in getting it cleared up.