SOLIDWORKS PDM repoints the reference to the source file after the merge action. If Always work with the latest version of files is selected, SOLIDWORKS PDM repoints the reference to the latest version of the source file. You must have read file permission for the latest version. If Always ...
The points above is a major difference between COMSOL and "older" FEM programmes, and so long this is not correctly understood and accepted you will end up loosing your time and getting frustrated (as I did in the beginning) . But, once accepted you find new ways to do things and you ...