Hi bro, I was trying to unpack isaku game with tool and I successfully unpacked the message.arc with AI5WINARCTOOL but when I tried to unpack .mes files that I got form .arc file it gave me a error like illegal multiple bytes in position 0x9e somthing like that, I have tried both the original isaku and isaku renewal but the result was same.

Could you please look into the issue.

Also I tried to unpack shuusaku with both AI5WINARCTOOL AND AI6WINARCTOOL but nothing worked and while scrolling through the issues I found your comments to AIWINTOOL for shuusaku but still even the unpacking of .arc file was a success there isn't any tool available for .mes file extraction.

Could you do something about this as well.

Thank you.

I'm trying to unpack the MES.arc (which contains the scripts files) from the game Doukyuusei 2 (1997) by elf, and your tool sends an error "cp932 codec can't decode byte 0x9e in position 72: illegal multibyte sequence". Could you take a look? Intersting enough, it works normally with another game by elf, Doukyuusei, which is the first game in the series. However, when i extract the files from MES.arc from Doukyuusei, then convert .mes files to .txt, edit the scripts inside of them, then pack everything back, the edited text appears inside of a game either as dots or gibberish. I don't know if just sending you the MES.arc files from both games would be enough, here's the links where i found them.
https://archive.org/details/elf_doukyuusei
https://archive.org/details/doukyuusei-2
Some person have already patched them to run on modern systems. The download speed is slow however. If you don't want to dowload them, i can send you MES.arc files later.

I've been having this error come up with the MES tool multiple times. I've tested Isaku Renewal, Doukyuusei 99, and Be-Yond. All of them don't extract to txt files. On the ARC tool, the keys files doesn't extract oddly and I get an error there.

Hey,
I was trying to use your AI5WIN tools with the game, Shuusaku, but unfortunately it's not compatible with it. I believe it uses a modified version of the engine. I uploaded the game here: https://drive.google.com/file/d/148Git02yIaudEFV8_1gvxlf6KQZqcPY8/view I would really appreciate, if you could take a look sometime.
Some russian guys attempted to make a translation many years ago, and made some tools for it which can be found here: http://zz-uu.narod.ru/downloads.htm
The source codes might provide some info about the game. Unfortunately, their mega tool is far from perfect.

Hello
The error occurred in silky's old game. （姫騎士アンジェリカ）
I used this tool after trying SilkyArcTool to no avail.（the main program is AI5WIN.exe）
The unpacking went very well, mes.arc was unpacked into .MES and .LIB .
I can see the text in the MES file, but after repack the package directly with the default option, when I open the game，it shows “can't find bg.arc ”.

Hello! When i try to decompile files (.arc) from Shangrlia i get this error:

Could you give me a hand with that?