CATIA-V4/V5 Advanced Interoperability

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Click on Open Application Dictionary to associate an Application Dictionary.Select the Tubing Discipline and enter a Client ID for the Feature Dictionary (three letters C in this case : TUB).Click OK.
The default Classes will be added to the Feature Dictionary under Classes View. You can't rename or delete them, but you can create Object Classes under them.Make your additions and save the .CATfct file under the Directory: \graphic\.