[ChrisA]

Relays have 2 variables to control them. So if your other variable (relay1_rev) isnt set to 0 then nothing will happen. If you switch directions elsewhere in the code and you don't change relay1_fwd to 1 there, then you will have both of the 2 relay variables set to 1 which is an error.

Also, the : after skip in the if then statement line is not necessary.

Why don't you try a different word than skip. There are some words that you cannot use for labels. Apparently this is one of them. I'm sure you could go look in the manual and find that skip is a different command. I took your code and loaded it into the editor and changed skip and added a random letter after it and the code tokenized.

If the code does not tokenize then I would not run it on the Robot Controller.