Hi nicolaiB, Thank you for your answer. I updated my own RAP file by removing the ReservedDO_x and ReservedDI_x entries and yes, it works. I do not get these warnings anymore. It is a hot fix though, I am afraid these entries may come back into the RAP file at anytime when I update something in PiCt...

Hi, I find I have the same problem as stated in the first post in this thread. From what I can see, when adding a MIO module, PiCtory is defining DigitalOutput_1 through DigitalOutput_4 and DigitalInput_1 through DigitalOutput_4 by default. It seems to also define the 'hidden' variables ReservedDO_1...