For the scorpion cart the line referencing the file is referenced as;

scorpion_cart.cas

referencing the RTW/data/models_unit directory.

so if I write it as

WHTW/data/models_unit/scorpion_cart.cas

It thinks I am referencing a file called

RTW/data/models_unit/WHTW/data/models_unit/scorpion_cart

how do I make it reference

RTW/WHTW(the modfolder)/data/models_unit/scorpion_cart.cas