[Alan Anderson]

See all those red dots on your Compressor Open VI? They're telling you something. You can't always use an integer when an enumerated type is expected. Something is probably off by one from what you think you're telling it.

Delete those integer constants (remembering what they are, of course). Right-click on each input of the VI and choose "Create constant" from the pop-up menu. Then you can choose the correct relay number and module number and Digital I/O number from the enumerated constants that appear.