I do have access to the source code, and it's using 1, 2, 3, and 4. Unfortunately, it only explicitly references the ERB board in the constant name. The others are just inboard1 and 2 and outboard. I believed I had it set correctly. I've tried different combinations of those, but so far every one has yielded the same error message. Is there a possibility that something else is going on? I cannot currently add in breakpoints to see which individual board number is right/wrong.