MIDP 2.0: Problems on real device

Question

Hi All,
im experiencing an issue with my small midlet. I wrote it using NBeans5Beta and tested on WTK 2.3 and it worked fine- without any exceptions beeing thrown etc. But on real device I have - Moto V600 (MIDP 2.0, CLDC 1.0) it crashes in some strange way.
The app has several classes with their forms. An those forms it is possible to 'click' on some items and this navigates to the same forms but with a bit different content. It looks like this:
1. Class 1 has its form (FormClass1) - that is created& populated on creation and modified when handling an item command from this initial form. This form serves as micro browser through hyperlinked pages.
When on a specific textitem a command is invoked the class just clears the form using:
FormClass1.deleteAll()
changes the title:
FormClass1.setTile("xxx")
and adds some new elements (text items) to the form.
2. Class2 has also its form (FormClass2)- and behaves exaclty the same as class 1 with one remark - no title is changed.
When I run the midlet on WKT simulator - it works just fine - no issues, crashes, exceptions. Ive tried with several sims (some Moto provided, WKT several versions) and it works.
When I upload it to my V600 - it crashes on Class1 when 'clickin' an action that rebuilds the form. One important remark here is that once I click the link on Page1 (ex. targeting to Page2), i can see that my form is reloaded with Page2 contents - but when I only press my up or down button on the mobile (what makes navigation on page elements) - the app exits - im back on my phone main screen. The message is that application performed some incorrect operation.
What is even stranger - is that when I perform same operations for Class2 - it works - i can delete all elements from its form - readd new elements and still navigate without crashes.
From the code perspective those two classes looks almost the same (structure). And this makes me even more confusing.
Can I test it somehow on my PC (simulator) with some more strict restrictions - that I will catch this issue and can debug it ?
Looking for help.
Thanks in advance
Cheers
hypark

Answer 1

Huh, answerying my own questions ( i do not expect any dollars from that :)).
Anwyay - doing new Form() instead of deleteAll on FormClass1 helped a lot :). Still dont know what is the root cause of that situation but now will look into it more efficient.
For Moto phones there is a nice utility called Midway (2.*). Once U have an USB cable You can track with that utility the output from Midlet running on real device (both exceptions, and System.out/err statements :)).