Nokia 7210: Unable to run (ANY) application

[done]

I understand that "Unable to run application" is a way to say "No more heap memory available" for N7210 phone. But I have i MIDlet that starts, runs and finishes ok few times, but then it starts to state "Unable to run.." in startup, and EVERY java MIDlet I have installed, including very simple ones, refuses to start since then. With the same error message, untill I restart the phone. Then everything is all right for some time.
What kind of error have I done, that affects the application after I restart it and even all other java MIDlets?
Software version:
Nokia 7210
V 3.09
02-10-02
NHL-4
(c) NMP

Thanks in advance,
Dan

[shmoove]

Sounds like a classic case of memory leaking.

[done]

Memory leaking after closing an application?

[done]

Just for the record: I was a bit overusing DirectGrahics.drawImage(). I replaced most of the occurences by Graphics.drawImage() and it works now. Don't ask me why

[mariusfahlbusch]

just a stupid question, but how can memory leaking happen in Java??
I thought all null objects would be collected by the GC when quit?
Or is it then just all non-null objects that would leak it?
but I mean if you quit with the endcall button there is no way you can catch that?

[kisember]

just a stupid question, but how can memory leaking happen in Java??
Eg.: simple JVM bug.

[mariusfahlbusch]

I am experiencing the same problem, but couldnt find anything that might still cause it:

* I am dereferencing everything in destroyApp()
* I dont use any DirectGraphics.drawImage() calls
but I use some drawPixels() calls, together with one mutable image. I read that transparent mutable images could cause memory leaks, so replaced transparency with colorkeys..
* I null EVERY single thing that exists on earth

and still when I play a few levels, quit the game and try to restart it again, then I get "unable to run application" again..

It makes me mad!

The game itself NEVER crashes!
The only thing that comes to my mind is that I enumerate all maps, i.e. load ALL maps, store their description texts and release em again for mapselection, works fine for my memory, like I said the game wouldnt crash, just when you restart the game : (

Any ideas?

Marius