Hello,
does anyone else noticed if starting with H20.5
the undo for a python definition that run in a parameter callback script doesn't undo properly as a single operation any longer ?

All works fine up to H20 over here.


Thank you in advance for any info!

SOLVED:
For anyone bumping into the same issue here is a description:

My python callback script was running from a menu parameter built using a python script.
In H20.5 seem SideFX improved its undo tracking history
and the python code used to build the menu needed some changes in order to make it work again for my case.

Overall undos in H20.5 are more reliable and they are capable to undo menu parameter selections and run their callback script every time an undo is performed, which wasn't happening in prior Houdini versions from all my tests.