Importing two assignments into one project file

Hi,
I'm working on a protein that I have expressed and assigned as two constructs, and now I want to use the two assignments in the assignment of the full length protein. I have managed to import one assignment from one project to another, but I don't manage a second one. How can I do this?

Thank you!

Have you tried the description described on the wiki on structure calculation of complexes for merging two projects?

http://wiki.cara.nmr.ch/StructureCalculationOfComplexes

Best,
Fred