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creo4 config.pro option documentation for: PIPING_MCAT_DIR_FILE            

piping_mcat_dir_file

(Spec-Driven Piping)
piping_mcat_dir.csv * , <valid file name>
Specify a name for the file that contains all pipe and fitting master catalog files.
 
* The Piping MCAT Directory file must be stored in the directory location specified by the piping_mcat_dir configuration option.