My guess is that you still have the connection to the Poser file "alive".  Means, you import a pz3 and leave this as it is then. The intention to keep the connection is that you are able to work on the Poser scene later ans the Vue content is updated then automatically (Vue detects the changed pz3 and asks then).

What you should do is to import a Poser file and then directly save the import as vob with the embedd texture option on. Then load this vob and work with that furtheron.

The only case when this is not working for me is when there are textures missing in the import and I do NOT do a search for them. The reference to this missing texture then is in the Vue scene and it will always ask for the texture, whenever I (or someone else) open this scene.

The other case where the link can not be broken is when you work with animations.
Then the pz3 file HAS to go with the Vue scene because Vue reads the animation information from there.

Oh, another trick might be to simply ungroup (and regroup) the imported item. Then the link to the pz3 and to Poser is broken as well.

One day your ship comes in - but you're at the airport.