I'm not sure, but this variable sounds like one from the WEU (world editor unlimited).
If you use the WEU, go into your mapheader (trigger editor, the map symbol on top of the trigger) and delete everything you didn't wrote yourself (if you didn't worked with the header, just delete anything). Then open the variable window and delete all udg_zz variables (and everything you didnt created yourself...). After this, your map should work again. Use the normal WE oder the JNGP (Jass New Gen Package)
Justify