04-16-2013, 11:48 PM
Which version of JPCSP are you running (what rev and what architecture), and which version(s) of Java do you have? 64-bit JPCSP requires 64-bit Java, which isn't the version most Windows users will get if they go to www.java.com and hit the "Agree and start free download" button. You need to look at all the Java downloads and select the one that matches your copy of JPCSP.