I am having the same/similar problem with Poser 12.  I am using Windows 11.  When using search, I can get maybe 2-3 searches done in Poser, and after that, typing anything into the search bar yields nothing.  Poser has just given up.  The only way to get the search functionality back is to restart the application.  

It's hard to determine what is failing because I just installed Poser 12 on a new computer with a new operating system.  I was using Poser 11 on another machine with Windows 10 and search always worked.  

I did put my runtime in the D: directory (as opposed to C:) but if this wasn't going to work, it doesn't explain why the search function initially works for a couple of searches, and then stops completely.  

If anyone has an ideas or specific knowledge,  please clue me in and it would be greatly appreciated!

TKS

Heather