Extract details corresponding to multiple responses from pull data function

Hello there,
I am using the pull data function to select students’ names from an external file. This is working well. However, I also want that for all the students whose names have been selected, their registration numbers should be pulled from the same external file and displayed in the next question which as text and read only.
I have successfully done this for a select one function, but I have failed when using select multiple function.

Please help.

Welcome to the community, @francis22! Could you share a sample of your work regarding what you are trying to do? The community could then help you solve your issue if it’s possible with KoboToolbox.