Integration with Other Applications > Windchill Workgroup Manager Documentation > Creo Schematics > Administration and Configuration > Configuring Business Practices > Configuring Naming and Numbering > Windchill Preferences for Naming and Numbering
  
Windchill Preferences for Naming and Numbering
When set to Yes (default is No), the following preferences omit file extensions from name and number attributes for new ECAD documents during upload:
• Upload Drop Name File Extension.
• Upload Drop Number File Extension.