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the COMSOL suite use standard flexnet licensing with short sign.
I dont know if the last version changed to ECC protection and long sign..
Debug the target with ida and yo'll find the flexnet routine.. If is an exe file you can easly fish the seeds and make a working license.
If the program has changed to ECC, the old trick to patch the 2 flags is not working anymore because flexnet developers covered this hole.. Patch directly the pubkey_verify and make a short standard license...
Or upload the target or the vendor to see if the protection is changed..
vendor: LMCOMSOL
seed1: Exxxxxx3
seed2: 7xxxxxx4
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