[Laszlo-dev] ack! completely blank screen, compiling to swf9 with debug=true

[Henry Minsky]

Hi Sarah,

I just wanted to make sure you have the right debugging tools in
place, because it sounds like you're not
getting the runtime flash player errors displayed.

You're running the Flash 10 debug player, right? That has to be
downloaded and installed specifically,
the regular Flash 10 player will silently discard a runtime error
without saying anything.

When I run the test-video app in swf9, I get something like this
displayed in an alert dialog from the player

TypeError: Error #1009: Cannot access a property or method of a null
object reference.
	at $lzc$class_mediastream/_addListeners()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:548]
	at $lzc$class_mediastream/_onNetStatus()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:539]
	at flash.net::NetConnection/connect()
	at $lzc$class_mediastream/_createStream()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:518]
	at $lzc$class_mediastream/play()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:126]
	at $lzc$class_mediastream/_handleAutoplay()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:184]
	at $lzc$class_mediastream/$lzc$set_url()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:937]
	at LzEventable/setAttribute()[/private/tmp/lzswf9/lzgen24751/LzEventable.as:62]
	at $lzc$class_mediastream/init()[/Users/hqm/openlaszlo/lib/jakarta-tomcat-5.0.30/temp/lzswf9/Users/hqm/openlaszlo/trunk7/test/video/build/example-mediastream/$lzc$class_mediastream.as:895]
	at LzNode/__LZcallInit()[/private/tmp/lzswf9/lzgen24751/LzNode.as:482]
	at LzCanvas/__LZcallInit()[/private/tmp/lzswf9/lzgen24751/LzCanvas.as:450]
	at LzCanvas/__LZinstantiationDone()[/private/tmp/lzswf9/lzgen24751/LzCanvas.as:397]
	at LzInstantiatorService/makeSomeViews()[/private/tmp/lzswf9/lzgen24751/LzInstantiatorService.as:234]
	at LzInstantiatorService/checkQ()[/private/tmp/lzswf9/lzgen24751/LzInstantiatorService.as:171]
	at Function/http://adobe.com/AS3/2006/builtin::call()
	at LzEvent/sendEvent()[/private/tmp/lzswf9/lzgen24751/LzEvent.as:89]
	at LzIdleService/__idleupdate()[/private/tmp/lzswf9/lzgen24751/LzIdleService.as:53]
	at LzIdleKernel$/__update()[/private/tmp/lzswf9/lzgen24751/LzIdleKernel.as:25]


You can also run the fdb debugger from the command line like

fdb "http://127.0.0.1:8080/trunk7/test/video/example-mediastream.lzx?lzr=swf9&debug=true"

and will see something similar on the command line, once you've
connected to the app.

In this case, if I click "Continue" on the Flash error dialog window,
the app comes up and displays the
Laszlo debugger window, although the video views fail to get created,
due to the error above during
the processing of the  instantiation queue.



On Wed, Mar 18, 2009 at 12:17 PM, Sarah Allen <sarah at ultrasaurus.com> wrote:
> just sent to laszlo-dev "For Review: Change 20090318-sallen-L Summary:
> improvements to videoplayer, WORK IN PROGRESS"
>
> Thanks!
>
> On Mar 18, 2009, at 9:12 AM, Henry Minsky wrote:
>
>> I'd be happy to help out here, I'm an old hand at getting blank
>> screens in swf9 :-)
>> Where can I get a copy of the test case to compile?
>>
>> On Wed, Mar 18, 2009 at 11:07 AM, Raju Bitter <rajubitter at me.com> wrote:
>>>
>>> Do you see any entry in the catalina.out Tomcat log file? Does the
>>> LZX->AS3
>>> compilation start? If you get the AS3 code (which I doubt), you could run
>>> that out of Flex Builder for debugging purporsed, or use fdb (Flash
>>> Deubgger). I'd be willing to test on my machine as well, if you send me
>>> the
>>> files.
>>>
>>> - Raju
>>>
>>> If not, you'll probably have to set your log-level to debug and digg
>>> deeper.
>>>
>>>
>>>
>>> - Raju
>>>
>>> On Mar 18, 2009, at 4:01 PM, Sarah Allen wrote:
>>>
>>>> So, I've been working away at fixing a/v bugs and compiling to swf8.
>>>>  I'm
>>>> almost done with my most recent round of fixes, so I'm reviewing my
>>>> changes
>>>> and checking to make sure I didn't break swf9... whoops!  I get a
>>>> completely
>>>> blank screen, no errors, no warnings, no debugger.
>>>>
>>>> Have you seen this before?  Is there any way to debug this aside from
>>>> going back to a known state and re-applying my changes gradually until I
>>>> find the line of code that breaks.
>>>>
>>>> Thanks in advance for any advice,
>>>>
>>>> Sarah
>>>
>>>
>>
>>
>>
>> --
>> Henry Minsky
>> Software Architect
>> hminsky at laszlosystems.com
>
>



-- 
Henry Minsky
Software Architect
hminsky at laszlosystems.com