it happened to me the only thing I can think of is... that u imported any material? I once imported some icons and I saved then exit world editor I enter again and my map has exaclty that error, that also can happen if u import a corrupt skin, I know that too, how to know that a skin is corrupted? easy, just check its size, if it is 0 bytes then DONT import it, its corrupted and u will lose all job done, just do this next time: -ALWAYS create backup of ur map, before completely finishing using world editor for that day create a backup of ur map and erase the old backup -Like I said check about corrupted skins or blp files
Now if u REALLY imported corrupted material the only way that I know to fix would be too using a MPQ unimporter or something like that to erase what u imported by mistake, if the error was caused by anything else then I dont know, Im just trying to help, im sorry if this doesnt help, good luck
how to know that a skin is corrupted? easy, just check its size, if it is 0 bytes then DONT import it, its corrupted and u will lose all job done, just do this next time:
