Disappearing Key Assignments

[twoweims]

I am pretty sure that I destroyed the cable while re-assembling the calculator. It moved and I pinched it pretty bad between the case halves. I also need to verify the pinouts on the serial cable that I have.

I am using your clupdate software on macOS 10.15.2.
The software seems to be installed correctly but I just get timeouts when trying to connect to the calculator.

Could be damaged cable as noted above, bad serial cable, incompatible USB-Serial Converter, etc.
If I had access to a windows computer with a real serial port (if such a thing even exists anymore) I could eliminate a couple of variables.

I am afraid to disassemble the calculator again because the posts were marginal to begin with and I may have some extensive work to do to get it running again.