GECK Crashing While Loading a Mod

[KnightBlade2]

I'm trying to load Theko's "Mobile Vault" mod to add some map markers. I'm using GECK Powerup NV 1.4. I get a few errors, then an error window about a couple of wilderness navmeshes having an edge in common. I click "yes to all", then GECK just crashes. I can't open the mod.

 

Any suggestions?