Issues with F.X and F.MINIP

When testing !924 (merged), we find F.X does not work no matter we put it in a combination code, a vertex code or just as a single particle filter.

We also notice that F.MINIP triggers a segmentation break for a few events. For example, if one use this option file: Hlt2DiMuonLines_detachedJpsi_new.py, to test !924 (merged) but with this line replaced by this line, it triggers a segmentation violation and get stuck.