Crashes on run and save form

Question

In the same form:
When I run the form from Forms Runtime, it works.
If I run the form from Developer without compiling it before (just after open), the form crashes silently.
If I compile it before run, the form is working well, but if I try to save the form after, the following windows error is generated:
The instruction at "0x67fae824" referenced memory at "0x00000005". The memory could not be "read".
The form can be saved only if is not executed before from developer.
I am using Forms 6i (patch 11) on Windows2000
GB

Answer 1

Two problems in the same form:
First, if I run the form from Developer without compiling it before (just after open), the form crashes silently, even in debugging mode.
The forms crashes in first block, after firing block level triggers and post query trigger (the data is fetched from database), but before displaying data.
This data block is on a separate window.
If I compile the form before run, it is working well. (When I run the form with Forms Runtime, it works, too.)
Now is the big trouble:
When I try to save the same form AFTER executing it from Developer, the following windows error is generated:
The instruction at "0x67fae824" referenced memory at "0x00000005". The memory could not be "read".
The form can be saved only if is not executed before from developer.
The problem persists even after reinstallation.
I suspect some form internal conditions mismatches generated by my form.
I am using Forms 6i (patch 11) on Windows 2000.
GB