attaching X Ref "AutoCAD Map Messages"

[tim_newsome]

I am trying to attach another DWG and I am getting the message below.

What is this?

[CCarleton]

Based on some google-fu it looks like this is related to object data, specifically called out as Contour_Wake. I'm not super familiar with object data, I've used it before, but very lightly (IE: attached it to lines to call out fiber count). Never created tables or anything past that. Are the drawings referencing the same object data? There may be some sort of discrepancy between the two drawings that CAD isn't liking.

[tim_newsome]

Thanks for the info, I wish I could answer your questions. I have just started with new company and I have inherited the files so I am just going to Wblock.