See if this page can help you, Stubby. Here's an exerpt:
Quote:
Originally Posted by Interlopers Error Report
Description:
Your map is too big (you have brush(es) too near to the edge of the grid) or you have invalid brushes.
Solution:
If the problem-checker in Hammer (alt+p) doesn't find any offending brush(es), and you can't see brushes near the edge of the grid, you should use the cordon tools or visgroups to find them.
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This comment is entirely the opinion of Mudkip and doesn't reflect a final development decision one way or another. The topic is currently being discussed, and testing will take place in order to decide on the ideal course of action, based on decisions made during that discussion.
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