I'm talking about the E.D.U. the last I have is the 3.0 that came with the last update of Regiment and Ethnic Diversity of Gedemon: http://forums.civfanatics.com/showthread.php?t=238671
and you updated Regiments to EDU 3.13 (at least that is the way I understood your first post) ? You did note that I linked to a post where some EDU 3.13 bugs were mentioned ?
imo the most likely reason for a CTD is that you reference some art definition (in CIV4UnitArtStyleTypeInfos.xml) which does not exist. Go to world builder and place each unit on the map, the one which CTDs is the one where your reference is wrong.