Strange Ground2k4 compile error

I was working on my G2k4 scenery and went to compile, and when it got to "Night lines" step 1 it gave me a compile error. Looking in the Ground2k4.log it had this listed:Start 6/23/2004 12:23:46 AMVerify : degenerated poly at bitmap : X= 3795.34560863723 Y= 1576.96113629139End 6/23/2004 12:24:25 AMI don't know what degenerated poly means? Furthermore, this was off a poly that I drew (and compiled) yesterday? All of a sudden today it is not compiling? These polys are water polys which are sections of a river. The poly in question was the last one to get drawn the day before, and I added one more section to the river before compiling again.RuahrcPS Still can't figure out the landclass thing- anybody have an idea?