Follow below steps:
1) Create one new source system container.
2) Click on subject area tab in new source system container
3) And give right click and select ownership.
4) Now click on reference.
5) One new window will open....left side select source system container from which container you want import subject area.
6) Now select subject areas which you want to import.
7) Click on Add button.
8) And Assemble those subject Area and create execution plane.
Let me know any more issues.....
Mark if Correct/Helpful.....
But my question is how to do take an export of only one subject area? I have lot of subject areas defined in my DAC source system container(Test container - SA1,SA2,SA3,SA4,SA5...)
So Now I want to take only an export of Subject area 4(SA4)......How is it possible?
I tried with normal export button option but it is taking all subject areas.