Yes it is.

That's the strange thing about it. It seems to work for all parts I tried, except for the magneto thermal circuit breaker.

Hi, yes I did. Strange thing is, if I insert a normal fuse or a relay coil the auto numbering is working?!

I'm new in using this software and worked with it a few hours. I want to auto-number my elements but I can't get it to work. I have viewed video's on youtube and read the manual but whatever I try it doesn't seem to function.

I have a folio with a few conductors and two magneto thermal circuit breakers (fuses). I try to auto-number these fuses. When I go to the auto numbering section under project properties I make a new rule under elements called fuse.
I want to number my fuses as F1, F2, etc. The formula I get is F%sequ_1. This formula I copy into the fled "label formula" of the two fuses. I expected to see F1 and F2 by the fuses but it just shows the formula. What am I doing wrong?