strange error message

[joepallai]

So I have a weird error message that I've never seen before'  I was testing the attached map in chocolate doom through qzdoom builder and I get the following error message about 5 seconds into the map:    P_Cross Subsector: ss 12216 with numss = 5103

 

What does this mean?   and how do I fix it?

JPAsh003.zip

[scifista42]

BLOCKMAP size > 64 KB. Make the map smaller.

[joepallai]

okay, thanks