Can you remind me how I can insert two different (unrelated) parts into an assembly from the same part?
For the moment, by doing the "insert a component in an assembly twice on the same part", I get two instantiations from me. So if I make changes on my part, these changes affect the 2 instantiations in my assembly.
This method works very well, I just make a clarification:
When you do "saved as" you create a new CATIA file with the same one (ID N° internal) which allows you to relink the plan that points to the old version.
If you do "Create from" you create a new CATIA file with a different ID (you can't relink the plans of the old version).
A copy to windows (renamed) or a saved under (new name) from CATIA does not change the internal ID of the file, any files created in these ways can be re-associated with a CATDrawing pointing to any of these files. The CATDrawing update will take into account the changes made in the file on which it is pointed.
A create from (change the internal number) you will not be able to point the plan of the old file to the new one.
Under CATIA, the best practice when you want to create a version of a 3D file, you have to first open the 2D file, then edit / link open the linked document(s), (then you save the 2D and 3D at the same time) there you are sure not to lose any links.