Why do I get this error when I try to draft a 3d part?

Hello everyone. The title says everything. I'm working on a STEP file w/ Catia V6 btw. Anyone came across something like this before?

2 Answers

This is my tree. I was thinking if it's because my drafting file is all the way up there

No, I've never seen this message before. (but I'm still using V5 and haven't moved up to V6 yet)

My interpretation of the error message is that something is Hidden that is causing CATIA to display the message. Does the drawing look OK?

The severity of the message is WARNING. I would look closely at the assembly and see if you can find the hidden part/feature. If you can't find anything and the drawing looks OK, I would ignore the message and continue on with the drawing.