ProbeBasic backplot issue?

I seem to be getting the same error:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/qtpyvcp/widgets/display_widgets/vtk_backplot/vtk_backplot.py", line 706, in update_position
active_wcs_offset = self._datasource.getWcsOffsets()[self._datasource.getActiveWcsIndex()]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: -1

Did you follow the latest instructions in the link? 

Yes, 3 times.... same result.

New wrinkle. I went back and homed the system. As soon as it moves the error pops up, but I noticed no WCS was selected. I cannot select one until the system homes, but once I can, the backplotter works and the error doesn't reappear. It looks like I'm back where Unilogic was. Now I just have to figure out what part of my config the system dislikes.

Do you have a program loading on startup?   Typically we load a program file named blank.ngc, it's located in the probe basic examples file.   Try copying it to your nc files folder and setting it as default program in your ini.   This initializes vtk on startup. 

I do have a program loading on startup (3D_Chips). Weirdly, I do not have a pd_examples file in my nc folder, yet sim still loads fine referencing blank.ngc.

in the file tab with blank.ngc loaded, click edit gcode button then save as while you are in your linuxcnc nc files directory and it should copy it over to the correct directory

B.Reilly01 wrote:

I do have a program loading on startup (3D_Chips). Weirdly, I do not have a pd_examples file in my nc folder, yet sim still loads fine referencing blank.ngc.

ah in your start up line in the ini file, make sure to set G54 so the backplotter has a starting point!

I actually had already added G54. attached is my current ini and 3 hal files. Also of note, there is no blank.ngc on my system that i can find.

Found a solution: in my main hal file, I took out everything that wasn't axis or spindle and moved it to post-gui at the end. Now the error is gone. I just forgot to check if it backplots and if the offset is checked. I'll check that tomorrow.