[Qgis-user] Svar: Re: Qgis crashes frequently when digitizing streams over WMS images

[Mars Sjoden]

Hi, I'd like to "rudely" interject here.

In our use of QGIS (multiple versions) I have found there are some UI
elements which will unknowingly cause QGIS to crash on certain machines
(Mac and Windows).

On some machines using a contextual element to perform a task will cause a
crash, while using a "button" element or perhaps a "menu" element will not
cause a crash, vice a vice versa in some instances.

It may help your 'cause to be extremely detailed in all your steps with
exact use of the UI (if only for your own well being) to narrow what it is
causing the crashes.

For instance
(only in my case, not suggesting it is yours I am using this as an example)

I found that "double Clicking" a Layer to invoke the "Layer Properties"
window would cause QGIS to crash when I clicked the "Apply" or "OK" button
in the "Layer Properties" window.

However, if I Control/Clicked the "Layer" and selected "Properties"
everything would be fine.

This meant having to adjust how i interacted with QGIS UI, and took me
forever to solve the issue as it was seemingly random, until I took notice
of my very exact steps.

I am sorry that you are having these problems, there are fewer things as
frustrating as having software crash with no apparent reason when you
depend on it.

Good luck in your debugging hunt!

mars


On Wed, Jun 6, 2012 at 7:50 AM, Lene Fischer <lfi at life.ku.dk> wrote:

>  Hi,
> Today I reached the same problem. In the middelof a lecture with 25
> students 3 sessions crashed with no warnings.
> I had the same lecture last week with no problems...
>
> I tried to work with the data myself for 1 hour. 2 times it crashed again,
> but without a significant reason.
>
> We have been using WMS-layer and shape layer.
> A the first pc, it started with polygons didn´t appear after filling out
> the attributes.
> Trying to save - a crash.
>
> At the second pc : While digitizing and editing. After moving an object
> and then digitizing it was impossible to save the layer.
>
> We use Snapping Options to Vertex and Segments. This we didn´t use last
> week at the first lessons.
>
> Hope anyone can help.
>
>
>
>
>  Regards
> Lene Fischer
> Ass. Professor -  GIS & GPS
>
> Danish Center for Forest, Landscape and Planning
> University of Copenhagen
> Nødebovej 77A
> DK- 3480 Fredensborg
> Phone: 0045 40115084
> Mail: LFI at LIFE.KU.DK
> Skype: lene.fischer.dk
> >>> Filipe Silva Dias <filipesdias at gmail.com> 21-05-2012 15:06 >>>
> Hi Giovanni
> I think you already did more than enough to try to help determine what is
> wrong with (my) QGIS. If Im the only one getting these crashes then its
> safe to assume that there's something wrong "on my end".
>
> I keep getting them in two machines and I have made numerous attempts to
> understand what the hell is wrong with this. Maybe it is some specific
> configuration parameter of QGIS, I dont know.
>
> Fortunately for me there are other FOSS softwares I can use to do what I
> need and If I ever get rid of these crashes and find out what was causing
> them I will make sure to tell you.
>
> Thanks again for help and efforts
>
> Cheers
>
>
>
>
> On Mon, May 21, 2012 at 1:36 PM, Giovanni Manghi <
> giovanni.manghi at faunalia.pt> wrote:
>
>> Hi Filipe,
>>
>> > With tiff - on a new and clean project (opened, loaded .tiff and shp
>> > and started digitizing), this problem doesnt seem to occur, or at
>> > least is a lot less frequent.
>> >
>> > With WMS - it depends, sometimes I dont get any crashes for 2/3 hours,
>> > and on other occasions I get crash after crash.
>> >
>> > If indeed Im the only user affected by this, Ill switch to another
>> > software and be done with it.
>>
>>
>> Hi Filipe,
>>
>> I don't have any particular interest in confirming or not a bug. In this
>> case I cannot confirm. I tested your data for 20/30 minutes and didn't
>> get a crash. Last week I had to do a job that involved digitizing (using
>> the same WMS layer you cite) and didn't get any crash in many hours of
>> work.
>>
>> Does this mean that the issue is not confirmed? no... but as I tested on
>> two OS including the one you use it is suspicious that can be a local
>> problem. The only thing that does not convince me is that you get the
>> crash on two different machines. Maybe the issue is caused by a specific
>> QGIS configuration parameter?
>>
>> Would you be able to test in Linux, so it will be possible to get the
>> eventual error message from the Linux console?
>>
>> cheers
>>
>> -- Giovanni --
>>
>>
>
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