I'm having a weird problem with a couple of ARCs in one of my drawings. When you select the ARC to change it's color or move it or anything else it says "2149 objects selected. Are you sure you want to do this?" or something to that effect. I'm clearly only selecting the one ARC and there are no GROUPs in the drawing. The only thing I've noticed different is in the association lists that make up the code for the ARC. There's one dotted pair that has "ACAD_REACTOR" associated with it. Any ideas on how this got there and what the reactor might be?