Hi Francois，
Thanks for your quick reply.
The specific steps I took were：

Drag and drop reconstructed sources data (a total of 10 scouts were project to each file) from 2 subjects (for testing purposes) in Process1 tab.

Click on [Run] to open the Pipeline editor.

Run the process: Connectivity > Phase Transfer Entropy NxN. Then I chose all 10 scouts and two frequency bands (1518Hz & 1821Hz) to do PTE connectivity.

By running the process function, the PTE value can be displayed in a 10x10 matrix.
Then I repeated the 4 steps above. At step 3, I replaced 10 scouts with 5 scouts. Eventually, I got a 5x5 matrix.
When comparing the results of these two operations on the same subject and same frequency band, I found that the PTE value between scout A & B is slightly different. For example:
I tried several times, but always came to the same conclusion.
Have I described my problem clearly? What is the reason behind this?
Duan
Best