Note:
I actually edited the ships.tbl and weapons.tbl in the mediavps_3612 folder. Nothing's wrong by running that without debug mode. An error comes up in debug mode, but I'm not sure if it does crash.
Anyway, it happened this way; I deleted all the .tbls in the table folder in the mediavps_3612 and pasted them to a mod folder of my own, entitled "mediavps_3612 (custom)". They're located in C:\Games\Freespace 2\mediavps_3612 (custom)\data\tables now.
So I ran the debug for that mod folder, same error message comes up. I press "No" and then it crashes. In my opinion, it should work fine if it weren't run on debug mode, well maybe it's just because of my own mistake in making a mod folder, or whatever.
The log is posted.
[attachment deleted by ninja]