assertion failed error

[agentorangeguy]

I was working on my mod and i got an "assertion failed" error which made it crash. Something about the chunks > 0 or something weird like that. Now, I cannot open it. Tried re-installing exult but nothing worked. I had this problem before but i cant remember how i fixed it. Anyone have any ideas? it won't let me past the red screen at all without crashing.

[agentorangeguy]

exact error messages if this will help. Running windows 7 if that helps
-----------------------------------------
Assertion failed!
File: gamemap.h
Line: 123

Expression: (cx >=0)&&(cx =0) &&
(cy < c_num_chunks)

=======================

any one know how i can fix this and continue working on my mod? Thanks!