When mirroring the part, have you tried checking the box "break link to original part".....
no, parts have been mirrored with configuration, so there is no link to separate part, because it is the same file!
Solidworks Service just told me that only parts which have been taken for explosion need to explode, means
mirrored parts don't have to explode when not selected.
There must be a problem with my files, maybe one file has a bug or my system has problems, probably with the installation.
I will check at other computers if it is the same.
Thank you very much,