FAQ-0842 Attempting to install my MIDlet onto a Nokia 7650 by opening the .jad file results in a System Error. Why is this?


FAQ-0842 Attempting to install my MIDlet onto a Nokia 7650 by opening the .jad file results in a System Error. Why is this?

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Classification:	Java	Category:	Deployment
Created:	12/19/2002	Modified:	01/13/2003
Number:	FAQ-0842
Platform:	Symbian OS v6.1

Question:
I have created a MIDlet with a .jar and .jad file. When I attempt to install the MIDlet onto a Nokia 7650 by opening the .jad file the Applications program attempts to install the.jar file, but quits before completion, complaining of a System Error. Why is this?

Answer:
This is probably due to a mismatch between the .jar and .jad file. According to the MIDP 1.0 specification, the .jad file must contain the following fields:

MIDlet-Name
MIDlet-Version
MIDlet-Vendor
MIDlet-Jar-URL
MIDlet-Jar-Size

The values of the following attributes

MIDlet-Name
MIDlet-Version
MIDlet-Vendor

must be identical to those specified in the JAR manifest file. Furthermore the Application Management Software of the Nokia 7650 is strict about the value of the MIDlet-Jar-Size attribute, which must exactly match the actual size of the .jar file in bytes.