Hi, I have to make a modification the program in a Festo PLC at my work. Now I've already worked in the past with AB, OMRON, Schneider PLCS in the past so I was guessing it would be similiar but it seems Festo makes it complicated for nothing from some reviews I've read about people having worked with Festo PLCs in the past. Now I've connected the serial cable and have the Festo PLC program on my laptop but when trying to just upload the program that is presently in the controller to my laptop, it gives me a message saying something like 'Controller does not store source file' or something similar. Does anybody know what's the problem when getting such a message? Thank you.
