Creo ModelCHECK > start_config_options > Relation Update File
  
Relation Update File
Specifies the name of the external text file in which relations are defined, in the start configuration file. For example:
RELATION_UPDATE_FILE text/rel_update.txt
The relation update file has the following format:
weight_kg = pro_mp_mass
PTC_WEIGHT_KG = pro_mp_mass
weight_lb = weight_kg * 2.205
PTC_WEIGHT_LB = PTC_WEIGHT_KG * 2.205
part_no = rel_model_name()
PTC_PART_NO = rel_model_name()