I'm going nuts over here. I've having 3 differnet xnb tools - XNBNode, XNB Kit, EasyXNB - will not repack some files, even when I have not made changes. Yesterday I was quite happily working on my Expanded Maps mod, everything working just fine. Late last night, I realized that my Town map wouldn't repack in XNBNode or XNB Kit, the two tools I'd been working with. Even unpacking and trying to repack a file I had packed 2 days ago with no changes didn't work. I stumbled upon another tool, EasyXNB that was able to pack my town map. Now, this morning, I'm working on the StringsFromMaps file. I edited it a couple times yesterday, and was successfull, but this morning it won't pack! Normaly would think I'm doing something wrong, or missing something (beacuse it IS only 2 files I'm having trouble with, and god knows it's easy to miss one missing quotation mark in the string files), but I tried to unpack and repack the original game files, and it doesn't work! What on earth is happening?!?
You might try using XNB Extract: https://stardewvalleywiki.com/Modding:Creating_an_XNB_mod#First-time_setup
Thanks, XNB Extract worked packed the string file.... wish I knew what was going wrong with the others tools... Do you know if XNB Extract ever has issues with transparency on pngs?