Compile Error / Linker Error

Quickbuild is off. The imports are from file Segment.bmx importing file SegmentInfo.bmx and Socket.bmx. Some other imports do work, like Tag.bmx.

here is the import structure so far:

GameData.bmx imports:
_____GraphicPile.bmx (imports nothing)
_____SoundPile.bmx (imports nothing)
_____SegmentInfo.bmx imports:
__________Tag.bmx (imports nothing)
__________Socket.bmx imports:
_______________Segment.bmx imports:
____________________Tag.bmx (imports nothing)
____________________SegmentInfo.bmx <-- Fails.

the "_____" are just to show the hierarchy of files / imports I traced.