The problem is your arc.exe command
Code:
Works
".\Data_Compressing\TOOLS\arc.exe" create -ep1 -r -s; -w"%arctemp%" -m%METHOD% -dp"%gamedatadir%" "%arc%"
Works not
".\Data_Compressing\TOOLS\arc.exe" create -i2 -dses -ep1 -r -w"%arctemp%" -m%METHOD% -dp"%gamedatadir%" "%arc%"
I don't know exactly what the commands -i2 -dses do.