In MAPSB, Can we not copy Assigned Usage Expressions when user Copy and Paste objects.

In Manufacturing Associative Product Structure Browser (MAPSB), Can we not copy Assigned Usage Expressions/Line number when user Cut (or Copy) and Paste objects in the Downstream tab to restructure the MBOM.

I try to review <Windchill_Home>\codebase\com\ptc\windchill\mpml\xconfs\mpmlink.properties.xconf. 

But only find the information relate with FindNumber.

Need your help.