Reference viewer is acting weirdly?

I am frequently baffled by this odd behavior:  I am guessing it is related to how Windchill cache works?  Because (I think) it happens when I do a save-as offline and then try to upload a model when back on-line.  So upload fails, I try to investigate dependencies by opening the reference viewer.  System spins its wheels for a minute, comes up with this message:

whether I click ignore or confirm, the next screen is basically empty:

? so no dependencies - as I expect, since I removed all the old geometry references from it.  So I don't know what's going on as to why it takes ages to load the reference viewer, and its warning message, and the inability to upload / check-in this model.  Will attempt to save my work and restart from a new session, I'm just wondering if someone can shed some light as to what's going on.