I was trying to modify pick-up AIs for dolls. The modified xml file (aidescdata_autobot_vocaloid.xml, last updated in version 229, found under db\ai\local\) was working fine with abyss's data folder feature. When I used MabiPacker (version 1.2.1) to pack the said xml into a pack file I got NGS error after running the game for a few minutes. I also deleted the data mod and abyss when I was testing the .pack. I am sure I followed the guide for MabiPacker and also changed the .pack to read-only before launching the game.
Following are the codes in the xml I modified. I changed values under pet_shuttle_item, idle_pet, and specifically visualfield_radius for kristell doll.
Hm. I'm afraid i won't be too terribly much help in this area. I vaguely recall messing with my own doll ai at some point around version 230 i think, maybe a few before. Something in the dolls i edited, i do believe caused me a crash, but i don't recall what it was i'm afraid. I also am fairly certain it was a crasht hough, and not an NGS error. I ended up only editing a few lines related specifically to 2 dolls i was using and giving up on the rest. I later found out that making the dolls pick up fast, while nice, will cause major delays on the user end when you have multiple dolls, so do be careful when playing with the dolls.
At the moment, the only real advice i give is simply trial and error. If you've narrowed down the specific file, only thing i personally am able to suggest, is extract the default dollai, with no changes, into your data folder and try running the game to make sure it doesn't cause any issues. From there change specific feature or features, making note of what you changed, then re-apply mods and relaunch the game, emphasis on reapply, cuz you will have to remake the pack file if you made a change. You can use this method to narrow down the source of the problem, may be one specific feature related part of the code, or possibly a simple oversight such as missing a part of the code.
I do want to take a moment though, to show appreciation for your attention to detail on that post. It's extremely productive to list all that info, what you suspect is the problem, possible related files that may have caused problems, and specifically what you were attempting to do. Even if i alone can't help much, that kind of info is what others will need if they're able to be of any help, so respect to you for seriously listening to our requests on submitting help request.