LinuxCNC 2.8.1 configuration doesn't run after upgrading from 2.7.15

Hello

I have a 2.7.15 configuration with Mesa and concerning a Mikron milling retrofit. It works wellI
I try an update to 2.8.1, but my application does not start ?
A simple step / dir configuration test starts well
My setup has a lot of personal components. They installed correctly, except for a userspace component:
halcompile ignore the singleton statement?

Thank you for your advice

In your debug Information
Seems you should update Python or some in this area to

Thank you for your answer
I didn't do any development in Python.
the error points to a pin in my file
mikron_postguy.hal
I have a trivial configuration
with mikron.xml and mikron_postgui.hal

2.8 has a bug when it comes to userspace singleton comps.
I had to remove the 'singleton yes' line from the userspace comp file. Then add .0 after each reference to pins etc. in my hal files.

thank you,
I think my Pyvcp syntax is good, it works fine on 2.7.15.

under 2.8.1, if I modify my config options a little, the error points to other pins

Thank you,
yes there is a bug, I had to do the same
the other solution is to preprocess file.comp to file.c with halcompile from 2.7
and then install file.c with halcompile fron 2.8.1

Obviously 2.8.1 under axis limits the size of the xml file linked to PyVCP ?
the syntax of my xml is good it is big and has 3 tabs