file/replace doesn't work properly

I have a drawing of an assembly open in proe2001, so the assembly is in
session. This assemby contains a part that I just renamed in commonspace.
After renaming I synchronised my workspace. The workspace shows the part
with the new name.

I don't want to shut down proe so I used the file/replace command. Preo
flashes up a message to say all objects in session are up to date. This is
not true, as one of the parts in the model tree has been renamed!

If I do a file/save, it reports conflicts detected.

So why does file/replace not pick up the same conflict and reload the
renamed part?

The answer - it seems you have to do a regenerate in proe first! Then
File/replace will pick up the rename.

This is dangerous. How am I supposed to know I have to regen the part? I
could have done loads more work and saved the part, then hit the conflict
causing much wasted effort.