Well, it's not an executable jar, just a regular one (jar = Java archive), but Windows doesn't know the difference. The error message you receive when running it is expected.

So, where are you running validateInstall.bat from? c:\Rome TW, right? Then it should find eb.jar in that same directory. Possibly I've missed a problem when you have a space in the path... Could you try to rename the "Rome TW" folder to "RomeTW", then run the validation?