What does this error code in linuxcnc_debug.txt mean?

Not sure but your best bet may be to start with a full working simulation config and once that works remove little things at a time with testing in between.

Best to run problem configurations from a terminal and see what errors show up. Usually the first error you see is the one you want to address. Your configuration is trying to load trivkins twice...I've attached a 2.8 working vis machine configuration for you to study.

 
JT

Yes, I've been running from a terminal.

Thank you for noticing the double load of trivkins; I fixed that and the error is no longer appearing. However, now when it tries to access my gui file (vismach-testing) it says "execv(vismach-testing): no such file or directory." I changed it to loadusr -W ./vismach-testing like in the 3axis tutorial hal, and now it says "execv(./vismach-testing): Permission denied"... At least I've solved one problem, so thank you very much

That usually means that you need to mark the python file 'vismach-testing' as executable.

Yes, I was able to figure it out with some googling, thank you!

If you find a solution, PLEASE POST YOUR SOLUTION SO IT WILL HELP OTHERS!!!