Enterprise Administration > Windchill Export and Import > PTC Windchill PLM Connector - Creo Packages Administrator's and User's Guide > Windchill PLM Connector – Creo Packages > Exporting Packages > Preparing a Package for Export > Setting Export Preferences > Criteria > Block Export of Attributes on Master CAD Documents
  
Block Export of Attributes on Master CAD Documents
If you have configured Creo Packages to export attributes for master CAD documents, you can block the export of one or more of these attributes with the following preference:
export.pdmobject.master.iba.block=[attribute]
List the values that you want to block. Use commas to separate multiple attributes.
* 
For environments with bidirectional collaboration of these attributes, PTC recommends blocking export of the OWNERNAME attribute (export.pdmobject.master.iba.block= OWNERNAME). This attribute is populated on the target system during import, and has a different value from the attribute on the source system. For this reason, the attribute value is ignored during import.