Has anyone seen this error before?  What does it mean?  It seems contrary to reality.  In the case where I'm getting this error, my model was building fine consistently before turning on "verify on rebuild", and then it has problems starting higher in the tree than this particular combine feature (also odd, but worked around).  When I work my way down the tree fixing the problems, and I get to this feature, it will no longer build, and yeilds this error.  I'll attempt to upload the large model if needed, but I thought I'd start by asking what this error even means, as my search for it in this forum didn't turn up anything.

Charley Leonard