If you have something like this in your JAD file
MIDlet-Description: Your application MIDlet-Icon: /res/p1/icon.png MIDlet-Jar-Size: 273904 MIDlet-Jar-URL: http://someurl.com/application.jar MIDlet-Name: AppName MIDlet-Vendor: VendorName MIDlet-Version: 0.9.33 MicroEdition-Configuration: CLDC-1.1 MicroEdition-Profile: MIDP-2.0
Be careful and check if you have some empty lines in your JAD file because this is causing this error!
Just delete empty lines.
