Windchill+ doesn't have explicit compatibility with Solidworks. It has compatibility with versions of Workgroup Manager, and that is what correlates to version of Solidworks.. So for example, look at the matrix for your version of Windchill+ like this:
https://release-advisor.ptc.com/releaseMatrix?releaseId=2577
Look at the versions of Workgroup manager, then look at the matrix for the WGM to see the version of Solidworks.
