You under According to 2.2.1 in the CheckMate Pro Specification, the topology must be quads and triangles only for CheckMate Pro Certification.
This video will show you how to find and fix Ngons in 3ds Max. Ngons are polygons with more than 4 sides. The reason Ngons are not allowed in CheckMate Pro is due to the fact that models with Ngons are hard to animate and edit. Read More