Rules for Creating a clip file

I want to copy some lines and text from one design to another.

I have selected lines and text in my find filter and then windowed the selections.

Selected an insertion point and origin point as the tool requests.

I create the .clp file and store it in the same directory as the design I want to import this clip into.

But when I try to import this in I do not get everything I selected.

What are the rules for creating a clip file.