Can't open 10.1.2 project n 10.1.3

I have a library with about ten different projects edited earlier in 10.1.2. One of ten do not open only crashes FCPX. Mysterious behavior is that on some of the timelines were I have set the size of the clips to the smallest, if I try to change them to a bigger size that to also locks/crashes FCPX. Trashed preferences, repaired permissions, trashed layout but problem still there. Everything else works fine. Used pro maintenance tool to repair project but no. Anyone else with same problem?

Export the original as FCPXML, update FCPX, then try to import the old stuff as FCPXML. See if that helps.

With update do you mean reinstall ?

I suspect Ben may not have noticed your current version is 10.1.3 as you list in the topic title. In that case, just export the FCPXML from your 10.1.2 version if you have that on another machine and then attempt to import it into the current version. If you no longer have 10.1.2 then export from the current and perhaps a reinstall of the current version might help.

I meant update from 10.1.2 FCPXML to 10.1.3 FCPXML, if possible, as one of many alternatives.