Please open a support case so we can try to figure out why it crashed.
In the meantime…do you have another SpectroSERVER that has 10.2 on it?
If so, take the SSdb from that SS and move it to the machine that crashed and follow the steps below. If not, the only thing you can do (other than reinstall and/or reload a snapshot) is to initialize to legacy and load the models only from your 10.1.2 SSdb file.
On the SS that crashed:
First remove the lock file then initialize to legacy:
In the SS directory: rm .VNMDB.LOCK
../SS-Tools/SSdbload -il legacy.SSdb
From command line, load the catalog only from that other SS savefile:
../SS-Tools/SSdbload -c ../SS-DB-Backup/SSdbfromotherSS
Then take your latest SSdb savefile (the one from 10.1.2), make sure it is uncompressed, and load the models only back in:
../SS-Tools/SSdbload -m ../SS-DB-Backup/SSdbfrom10.1.2
Save the SSdb
../SS-Tools/SSdbsave -cm ../SS-DB-Backup/db_10.2.SSdb
Start the SS
Cheers
Jay