.Map :: MoHAA Mapping

When i click "Build map" it start's to build then i get the above message,if i get rid of the error message the build finishes and i go into my map as normal,and it all look's ok,any idea's?

p.s. tip for newbie mapper's like me-use the search-just found out how to do a night time map,excellant

Does the error happen with all maps or just your map? By the way, you can open a .map file with Notepad -- to copy and paste the worldspawn stuff.