The VTM mod uses both original Objectives maps and Occupation maps. It was fixed for Obj, but the Occ maps still conflict. Renaming didn't seem to work.
*Download
this VTM fix
to avoid problems with Occupation maps. The original VTM mod from the Download button above uses original Occ files. This fix only moves the 8 Occ mission files from VTM Missions folder to another folder. Remove them manually from your Missions folder to fix the problem(ALPS3_MP_Zone, ARDENS1_OBJ, ARDENS2_MP_ZONE, BURMA1_MP, BURMA1_MP_ZONE, BURMA1_OBJ, NORMANDY2B_MP_ZONE, NORMANDY4_MP_ZONE).
Also updated the main VTM mod page