Weapon type "TAG-C" found in loadout of mission file. This class is not marked as a player allowed weapon...skipping
<no module>! KiFastSystemCallRet
<no module>! WaitForSingleObject + 18 bytes
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! <no symbol>
<no module>! RegisterWaitForInputIdle + 73 bytes
This one just means that for some reason there is a TAG-C (missile that was used for a mechanic dumped from FS2, but left in code and tables, namely SSM missile system) in a mission weaponary pool. As I recall, the only mod that ever used SSM (and still uses it) is a BP: WiH (yes, that's right, you will see SSMs in there), but I think I seen TAG-C available in at least one of stand-alone missions in retail (one if the gauntlets?).