Why don my Windows batch files/Unix shell scripts work under JNLP Wrapper?
Currently, JNLP Wrapper doesn’t capture console output for native applications. For most native applications this isn’t a problem, but it can cause Windows batch files and Unix shell scripts to lock up. This issue will be addressed in a future version of JNLP Wrapper. For now, the workaround is to make sure your batch files or scripts produce no console output. You can usually accomplish this in Windows, for example, by beginning your batch file with the @echo off command.