Invoke Java via Batch File with Filepath Arguments

I'm having an issue getting files loaded into an app called GCS, by dragging them onto the executable. GCS can be invoked on Windows with a bat file, which goes like this:

@echo off
start javaw -Xmx256M -jar "GURPS Character Sheet.app/Contents/Resources/Java/GCS.jar" %*

If I hard code a filep开发者_如何学Cath in place of the batch argument wildcard (with quotes), it works. If I run the debugger with a filepath argument it works. If I echo %, it gives me the correct filename with quotes around it. If I add quotes around % it still breaks.

I have a disconnect here between the batch file and Java, and I'm at a loss. Does anyone recognize this problem? Thanks in advance.

I used a shortcut to the batch file to get drag and drop on invocation to work. But now I can't open with a double click outside of the bat's directory. :(