Hi, thanks by you reply but this ins't the problem, the circuit works with 10pF.
I found how fixate this, this is a setting problem.
Original configuration was:
System -> Set simulations options -> Tolerances (left down corner) -> Default Settings.
I changed to:
System -> Set...
Hi everyone
Sorry my bad.
There go the schematic and the error.
I joined the Proteus file too, so you can test it if you have Proteus.
Best regards
P.S::
Can i change TLE2141 by MC34071 without any problem?
My goal is controll the PSU using arduino, but need put its to work first :)