Multiple '.' not allowed in LinuxCNC

hi all. the question is more to qtplasmac but I checked the same in qtaxis for linuxcnc2.9:
when opening a file whose name contains two dots, for example "001. Some_cut.ngc", the file is not loaded and gives a warning: "Multiple '.' not allowed in LinuxCNC". in qtplasmac_handler.py i found:     
in interfaces on qt in linuxcnc 2.8, I checked the opening of files with the same name "001. Some_cut.ngc" and everything opens there without problems.

is this a bug or feature for linuxcnc 2.9?

It was a feature, but I don't remember why.
I tried to find the discussion on github but have failed.

Here is the discussion:
github.com/LinuxCNC/linuxcnc/pull/1082

thanks for the info mate.  this feature is like a big crutch like many other things, alas ((

You could remove that check from Qtplasmac's handler file. It's also coded in one other file but I'm not sure if qtplasmac uses it.

I'll see if I can find out the specific problem.

Is there any other reason to require multiple . other then preference?

I had a bit of a play with this by removing the inhibits from qtplasmac_handler.py and qt_action.py.
I also changed name, ext = path.rsplit('.') in the qt_action save function to name, ext = path.rsplit('.', 1) which then enabled saving with multiple periods.
After this I could load, run and save files with multiple and also multiple consecutive periods without any obvious errors. This was only tested on a sim config.