I'm glad you replied to me!
Modifying the file suffix cannot be installed on PSVITA because it only has 1KB.
I operated on WIN7 and WIN10, and the result was the same,
I downloaded the version you posted directly without adding any new characters, and tried to package it directly,
The same file can be packaged repeatedly, and the generated files have random suffix names.
It's possible that my computer is too old!
But it's not a big problem. I can install the VPK file you published on PSVita and add new character packs. I have new questions to share with you to help you improve Dolmexica Infinite: I tried adding many characters, but when there are more than 40 characters in select.def, an error will occur (provided that the characters are functioning properly) When version 1.5 encounters an error, an error message pops up, and when version 1.6 encounters an error, it can sometimes directly cause VITA to crash. Some character packs can run on Dolmexica Infinite for Windows. exe, but cannot run on Vita (character packs with large data and old Mugen versions), I guess it's due to graphics and CPU size. Finally, I would like to know what Mugen versions of character packs Dolmexica Infinite can support, and whether version 1.1 supports them?