Guess I am doing something wrong.
Wasn't able to recognize? Well, I just tried to do that myself and succeed, though process wasn't exact the same as i described. (i assume you have a tool already downloaded)
Let me do a bit of my explanation step by step, it may sounds long, but for me it took about 2 minutes, so in general its not hard to follow:
1. Initial setup:
I have campaign "Heroes Of Rivellon". It does not contains any addons (in your case it may - but it doesn't matter). I launched a play session with it and have some players - we played a bit and i saved with name "Quicksave 1" inside
"Documents\Larian Studios\Divinity Original Sin 2\PlayerProfiles\Seter\Savegames\GM" . So now i have a save game of a session with player characters.
2.
Make a backup of that save - just in case something go wrong, you won't loose all your progressJust copy that folder somewhere else
3. Run the tool, and select a second tab "Pak/LSV Tool" (don't forget to select DoS 2 in game drop downs)
4. Package path is a path to save game. In my case its
"Documents\Larian Studios\Divinity Original Sin 2\PlayerProfiles\Seter\Savegames\GM\QuickSave_1\QuickSave_1.lsv"5. Destination is what ever you want but be sure to select a clear, empty folder. In my case
"<someother folder>\Extracted save 1"6. Press "extract package"
Now navigate to the output destination folder (don't close tool yet) and see if its succeed. You should see a files: meta.lsf, globals.lsf, folder "gmactivecampaignsession" and etc.
7. No launch a game. Go into "Prepare mode". And modify settings of your original campaign. Check needed addons, press "Accept" and close the game.
8. Navigate to the
"\Documents\Larian Studios\Divinity Original Sin 2\GMCampaigns\<campagin you just modified>".
9. With tool convert meta.lsf to meta.lsx and open it in Notepad ++ (i use that one - but other text editors will be good too)
This can be done by selecting tab "LSX/LSB/LSF/LSJ Tools" and following same rule - select input file and output place
10. Do the same with meta.lsf inside
"Extracted save 1" folder and inside
"Extracted Save 1\gmactivecamapginsession"11. Checkpoint. You now have 3 meta.lsx files:
one from prepared campaign
another from
"Extracted Save 1" folder
third from
"Extracted Save 1\gmactivecamapginsession"12. In meta.lsx from the PREPARED campaign find
<Dependencies>/<children> node and copy everything it contains or exact addon you need.
so you will have something like that
<node id="ModuleShortDesc">
<attribute id="UUID" value="167f78fc-acac-4c83-a2c8-ae8eccaafa08" type="22" />
<attribute id="Name" value="My first mod" type="22" />
<attribute id="Version" value="268435456" type="4" />
<attribute id="MD5" value="" type="23" />
<attribute id="Folder" value="My_first_mod_167f78fc-acac-4c83-a2c8-ae8eccaafa08" type="30" />
</node>
<node id="ModuleShortDesc">
<attribute id="UUID" value="b518fa29-08ca-4401-8f01-04e8b5cb663e" type="22" />
<attribute id="Name" value="Scenes pack" type="22" />
<attribute id="Version" value="268435456" type="4" />
<attribute id="MD5" value="" type="23" />
<attribute id="Folder" value="Scenes_pack_b518fa29-08ca-4401-8f01-04e8b5cb663e" type="30" />
</node>13. Insert that into meta.lsx from
"Extracted Save 1" folder inside
<node id="ModuleSettings">/<children>/<node id="Mods">/<children>Order is matter! Because it will be order of loading. So be sure to insert it after what ever mods you already has there. For me it was GameMaster then Shared. If you already have some addons there - don't change them but add only ones you want to plug in.
14. Insert into meta.lsx from
"Extracted Save 1\gmactivecamapginsession" folder inside
<Dependencies>/<children>15. Convert all meta.lsx files from Extracted savegame back to meta.lsf. To be sure conversion is succeed - delete meta.lsf (don't forget to make a copy) first
16. Now using tool pack folder
"Extracted Save 1" back to savegame. if you didn't closed anything - you can just click "Create Package". Again to be sure convertion is successfull - remove lsv file from destination folder.
In my case i deleted "Quicksave 1.lsv" from
Savegames/GM/Quicksave 1/, pressed "Create Package" and got new and shinny save game.
17. Now you good to go. Launch game and try to load savegame.