You were right, I use 1200 for some other things, but...
even if I change the variable to, eg. 999 or 1000 (with corresponding changes in screenset), still no update of DRO.
It only works if I call a macro.
M1100.m1s:
counter = getuserdro(1100)
counter = counter + 1
setuserdro(1100, counter)
Anyway, I tried to help Sebastian since I do need counters