VampireKB, pls be nice, not everyone (including myself) is using the "Test Map"-button (e.g. for the reasons listed above)
To the problem itself: Dunno, afaik this error just appears if any of the imported stuff is corrupted or something happened while saving the map (pc crashed or whatever). So nothing that hasn't already been said.
IF YOU TESTED YOU MAP BEFORE THAT ERROR,THAN A COPY OF THAT MAP WILL BE SITUATED AT \gameroot\maps\test\WorldEditTestMap.w3x(or w3m) ___________________________________________
nothing more you need to know.
You get warned next time you post that.
And btw, it would be actually funny to see a map exploding.
Reasons: 1)Bad imported files (more chances to have a bad sound files) 2)Computer rebooting while saving map 3)End task of WE while saving map 4)CRC error at map archive 5)File at archive is missing