Midlet suddently stopped working

[kfonager]

Hi fellow developers

I'm working on a Midlet app, developing it with WTK2.3 ... the app runs fine on the emulator and for a long time it worked fine on my Nokia 6600 as well ... I install it OTA from my webserver ...

But suddently it stopped working on the 6600, but its still working on the emulator ... I even tested it on another phone (Motorola SLVR) and it works like a charm here ...

The installation runs fine, so i do not think its a jad/manifest problem ... and the midlet also shows up on the phone ... but when i try to run it, nothing happens at all ... it doesnt look like the VM is starting or anything ... I have included another midlet in the suite, and this one runs fine ...

Is there anything i should be aware of ? Have anybody experienced similar behaviour on the 6600 ?

I even have reset the phone to factory default, to make sure i'm testing on a "fresh" phone ... my firmware is the first (!) released, something like 3.47 ...

Any hints are appreciated ...

Thanks in advance,
Kent Fonager, Copenhagen

[balagopalks]

Hi kfonager! Welcome to Nokia Discussion Boards!!

I have seen in the "Known_Issues_In_The_Nokia_6600_v1_7_en.PDF" that

"2.26 MIDlet Installation Problem
Description
In very rare cases, installing a MIDlet to the Nokia 6600 smartrphone via OTA or Web Push may for some reason fail in the middle of the installation process.
If installing a MIDlet to the Nokia 6600 device via OTA or Web Push for some reason fails in the middle of the installation process, the half-installed MIDlet cannot be removed and the same MIDlet cannot be installed to the device. However, this happens very rarely.
This concerns software version 4.09.1.
Solution
No solution exists for Nokia 6600. Fixed in the Series 60 Platform 2nd Edition, Feature Pack 1 (that is, the Nokia 6620 and Nokia 7610 devices)."

Not sure whether this might be the case for your problem. Have you tried in a different 6600 with a different Firm ware?

Regards
Gopal

[soku123]

Hi,
This will be a software problem.I have worked on 6600 but havent noticed such a problem.

Thanks
Soku

[kfonager]

Gopal, thanks for your reply, but i dont think its the the problem i my case ... but thanks for your reply :-)

Soku, I'm pretty sure its a software problem, but I'm a bit concerned about how to move on to solve the problem and find the bug. It IS running on another phone ... is it possible wth some on the Nokia dev tools to do remote debugging ON the device ?

I have made is so that my midlet debugs into rms, and i then have another midlet thats reads from the same rms, but its still empty ... so nothing helps me there ...

Maybe i should take the app "apart" and insert small blocks at a time, to find out which part makes it non-working ?

Cheers,
Kent

[balagopalks]

May be you should give a try with updating the phone software of the phone.

Regards
Gopal

[kfonager]

I will do that tomorrow ... today everything is closed in Denmark because of some sort of holiday thing ;-)

But another thing ... what kind of programming "errors" can make execution of a midlet totally stop ... what happens if i write "int x = 2/0" in the startApp() ? It will throw an uncaught Exception and problably it will stop execution, right ?

Take care,
Kent

[balagopalks]

>>what happens if i write "int x = 2/0" in the startApp() ?

ArithmeticException : Thrown when an exceptional arithmetic condition has occurred. For example, an integer "divide by zero" throws an instance of this class.

Regards
Gopal

[kfonager]

Yes, I know ... but program execution will stop, if its uncaught, right ?

[balagopalks]

Yes. If the exception is uncaught, the app will exit!

Regards
Gopal

[hartti]

I am shooting into dark here, but 6600 is CLDC 1.0 device. Are you building the app for that configuration? Also you should not use floating point arithmetic.

Hartti

[kfonager]

I know, and its developed for CLDC 1.0 ... My problem is that it HAS been working, but suddently stopped working ... I've tried to find the problem all day, but no luck :-(

But thanks for your replies ...

/Kent

[MananW]

Have you tried installing it via PC Suite or transferring Jar into the mobile phones.
May be that can help you

[soku123]

Hi,

can you recheck your configuration in the project>settings>api selection tab.Make sure its cldc1.0 for 6600.
if it doesnt work,can u copy ur entries for jad and manifest?

Regards
Soku