Error Message -" Unknown word where unary operation could be"

Hi,
I've been having some difficulty with the cnc machine losing its x and why coordinate locations while milling. I narrowed one problem down to a display driver that was causing a severe latency issue and re-ran StepConf for and updated configuration but now I've received this error message "Unknown word where unary operation could be". I searched the forum with no luck, any thoughts??
LinuxCNC 2.7.8 on Debian 8
Dell Optiplex 760
DIY CNC with TB 6560 T3 Controller

I was running HalScope at the time.

Thanks

That's an error in your G-code.

The interpreter has found an unexpected letter or character in the code.

You could have also opened and saved the file with Windows notebook and you get extra strange characters.

JT

Thanks for the suggestion although I did not edit the G code and just used it directly out of Vectric V- Carve, I reran the part with the same G code a second time and it ran fine without any error messages. Is it possible that electrical "noise" can initiate this behavior and error message? If so are their tools within LinuxCNC to help isolate this problem?
Thanks again!

No. The message is emitted here:
github.com/LinuxCNC/linuxcnc/blob/af15a4...interp_read.cc#L1424

That is part of the code that reads a G-code file. Completely "inside" the computer and unrelated to anything mechanical or electrical.