Are you seeing a message stating that probing is complete? If so, then it's almost certainly noise.
I doubt that re-installing anything will make any difference. The only way that would help is if there's a problem with the M881 macro. I've never heard of that happening.
You could try creating a new .xml file from scratch and see if that makes any difference. I have seen .xml files go bad. But I don't think it would affect the operation of the macro, but I guess it's possible.
I don't really know a lot about electronics, but I think it's either .01uF