Importing only a subset of persons from a GEDCOM file

[Jhieminga]

I have been looking on these forums and the Reunion support pages, but could not find a clear explanation on how to approach this, so here goes:
I have a family file that contains around 1400 persons already. One branch that I have not investigated yet is my G-GMother on my father's side, but I recently found out that someone else from that family has done a complete family tree. I now have a copy of that data in a GEDCOM file and it appears to contain over 2300 persons and I'm not sure I need all of that data in my file. What I'm looking for is a way to import only a selection from that data into my own family file. What would be a good approach to achieve this? Obviously, start out with a copy of the family file to be sure... that is a given.
I have imported the GEDCOM file into a new, empty family file so that I can have a 'look around'. Should I work from this?
I guess I can go and mark persons in that new file, export these and then import them into my family file, but should I use GEDCOM again or is there another, better format? Or a quicker way?
Am I missing something? Is there an easy way to approach this? Any tips are welcome before I set out on this dangerous path....

[theKiwi]

Import that entire GEDCOM into a new, empty Reunion family file - you can get a new empty file by EXPORTING (from the Export menu) a Copy of your current family file with no people, no sources, no multimedia.

Then in that file you can Mark the people you want to export to your family file - either as a GEDCOM file, or as a Reunion family file, and then import that into your current family file.

Make sure you make a backup of your current family file first, incase things don't go as expected.

Roger.

[Jhieminga]

Thanks! Should I make sure not to have any 'doubles' after importing? Or can I merge these if needed?

[theKiwi]

Yes you should check if there are any duplicates, but before you do the import, you should really already know what to expect by having looked at the relevant parts of each of the trees.

Yes you can Merge them using Match and Merge. Check the manual for how that works.

Roger

[Jhieminga]

Technically, there is just one real duplicate, but I already added a few siblings there myself so there will only be a couple of duplicates, most likely. I cannot remove these from the import file without losing a few family connections, so I think it's best to try it and see. I will use copies so can always go back. I made sure only to mark ancestors, going back in time, so the import should not influence any of the descendants (which is the part of the family that I worked on). Fingers crossed...