Well I've recently made a 'survivor mode' (see "Maloss" topic in wip forum), one feature of which is upgrading/adding weapons. This unfortunately has run into a snag: whenever a new weapon class (as in one in a new slot, replacing an old one presents no problems, you can only use that weapon by dying - if you just go to a cp to collect it (ie respawn at a cp) then there is a CTD.

here's the unit's odf:

And here's the relevant bit of lua code (based on Mav's levelup system from FFx map):

Use "dummy" weapons for the weaponslots you plan on filling, instead of no weapon at all.