This is a gripe not a question. I get this sometimes while trying to mesh complex geometry.
"
The requested shape change failed because it results in
the deletion of the highlighted geometry. This geometry has
an association that cannot be deleted. "
1) No geometry is highlighted!
2) What does it mean?
I have slowly come to learn that this message indicates that certian idealizations can not share the same point. There is no indication where the problem is located and what can not share a point. This measage predates WF and it still exsists in Creo.