Thanks. Yes, the more I try to reproduce my old drivers in V4 the more stumbling blocks I seem to find. Several don’t compile because I am no longer able to read and write global variables via the device drivers. I think I would have to move a lot of code to scrips to be able the get the same results as before. I’ll try sticking with V3 for now, I think.
Is there a summary of changes between V3 and V4 somewhere? I couldn’t find a changelog or similar.