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New Developer
Posts: 33
Registered: ‎10-27-2009
My Device: Not Specified

907 Invalid JAR, Descriptor missing required attribute: MIDlet-1



I am developing one blackberry application, which is run perfectly in Simulator. It is blackberry application, not a MIDlet application.


Now i wants to run it in physical device

I've copy the .cod, .alx, . jad and .jar files on online web server in same directory.

Now i've open the url, which is pointing the .JAR file. It started a downloading the file.

But in middle it shows the error as "907 Invalid JAR, Descriptor missing required attribute: MIDlet-1".


My JAD file is as below:


Manifest-Version: 1.0
MIDlet-Version: 0.0
MIDlet-Jar-Size: 237357
MicroEdition-Configuration: CLDC-1.1
MIDlet-Jar-URL: StepsAway.jar
RIM-COD-Module-Dependencies: net_rim_cldc,net_rim_xml,net_rim_xml_org,net_rim_locationapi,net_rim_bbapi_invoke,net_rim_jaxrpc
RIM-COD-URL-1: StepsAway-1.cod
RIM-COD-SHA1-1: 8d e0 00 db d8 80 14 ba bd 4d 5b a2 4d ce e8 88 f2 16 0d 48
RIM-MIDlet-Flags-1: 0
RIM-COD-Size-1: 38512
RIM-COD-Module-Name: StepsAway
MIDlet-Name: StepsAway
RIM-COD-Size: 64324
RIM-COD-Creation-Time: 1256634746
MIDlet-1: ,,
RIM-COD-URL: StepsAway.cod
RIM-COD-SHA1: bc ee 16 0d 13 94 bb c6 7d c9 5c 12 a2 5c 7b 28 5b 2f 6d 1e
MicroEdition-Profile: MIDP-2.0
MIDlet-Vendor: <unknown>


Any help is appreciated.



Hall of Famer III
Posts: 59,066
Registered: ‎11-28-2008
My Device: DTEK50 (AAI82), PRIV (AAI795), Z10/Z30/Q10 (, Playbook (
My Carrier: TMobile USA

Re: 907 Invalid JAR, Descriptor missing required attribute: MIDlet-1

Hi there!

FYI -- you've posted this to the AppWorld Support forum...not usually for development issues. But, don't double-post, please check the link below and post the forum to which this should be moved...and then we will have this moved to that correct place:

That way, the right experts will have the best visibility.

Good luck!

Occam's Razor nearly always applies when troubleshooting technology issues!

New to the Community? Click here and also here for helpful guidance. Also please click here for additional helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions. If anyone has been helpful to you, please show your appreciation by clicking the button. Need a reference to BB10 OS/SR versions? Click here. Need a specific BB10 AutoLoader? Send me a private message.

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