[Dave Scheck]

Thanks for the correction Joe. After reading through the WPILib code again, I see how this is being done and agree with what you said about the resources. I also see what you mean about my code example. With the realays and digitial i/o on the same slot, it doesn't make any difference to specify the slot number in this case. I went back and put my original post in a spoiler tag to prevent confusion yet still have my bad analysis still available to learn from.

So, back to the analysis of the original error. The error clearly states that a resource is being allocated that was already allocated. I saw that Alan just posted a good suggestion that I was going to suggest next. My other suggestion (somewhat related) was to make sure there were no other places in the code that create relays, speed controllers, or analog/digital inputs on channels that were already in use for that resource type.