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What is the RGSS103J.dll, and how is it different from the old English and Japanese dlls? I assume its an updated DLL for RPG Maker XP but how does it improve the current DLLs?
It's supposed to contain fixes to work better with Vista. However, it is for the Japanese version, I am not sure what would happen if you use it with the English version.
RGSS103J.dll is made by RPG Maker XP. Without this file, the game will not run. sometimes, you need to set the Japanese locale language otherwise it won't work. You need to try by changing the languages. For your convenience, get the file from here:https://dlldownloads.com/rgss103j-dll/, and I hope you will have no problems thereafter.