"Invalid Application. Delete?" only when compiled with a nokia sdk

Question

I'm Developing a peace of software for my Uni and am currently attempting to implement NFC functionality witch requires me to move from my standard sun wireless tool-kit platform (implemented through net-beans) to a Nokia platform (also implemented through net-beans).

The problem is, whenever I compile the code with the Nokia platform implementation and run the program, on the Nokia phone I have or in the emulator, the phone displays a box stating "Invalid Application. Delete?" with a yes/no answer , stopping the installation the app. The strange part is that if I compile the exact same code with the sun platform implementation it runs with out any issues on the Nokia phone. I have tried this with two different Nokia sdk's (the Series 40 Nokia 6212 NFC sdk and the Series 40 5th Edition sdk) with the same results.

I was wondering if anyone else has come across this before and has figured out what on earth the Nokia sdk is doing differently?

Thanks For Your Help

Answer 1

Make sure that the following attributes (key:value pairs) are in the jad file and also the manifest file in jar:

1. MIDlet-Name
2. MIDlet-Version
3. MIDlet-Vendor
4. MIDlet-Jar-URL
5. MIDlet-Jar-Size

Answer 2

There seems to be some kind of discrepancy between a project created using a sun platform and a project created in a Nokia platform. Although the original program, initially created with the sun platform, compiled with the Nokia platform caused the application to be invalid, when I created a new project from scratch using the Nokia platform and just copied the source of the original program over the program worked. There is no discernible difference in the jad/manifest files between the two.

Answer 3

If you've copied source code, you may have not copied the "manifest.midlets", i.e. tells the OS which "forms" to create. You'll usually find this in the project properties.

(e.g. in NetBeans IDE - Application Descriptor, "Midlets" tab - it shouldn't be empty).