[Qgis-user] QGIS 1.6 project causing 1.7 to crash

[Purves Ross]

OK, thanks for the tip re file number! Fingers crossed it's not that though.

Sorry - now I get you. You mean can I load the layer called
'VectorBackgroundMapMarch2011' in its own right into a fresh project, right?
Here's the rub - and also why I was confused by your question - there's no
apparent layer with that name in the project! That's the name of the overall
.qgs file, not a layer within it. Seems strange?

Many thanks!
Ross



On 11 October 2011 13:53, Nathan Woodrow <madmanwoo at gmail.com> wrote:

> I recall hearing about a bug where layers fail to load if there is a
> certain number of files in the project but this might be something
> unrelated.
>
> I mean can you load /mnt/bunker/ross/Research/PhD/NewMapMarch2011/VectorBackgroundMapMarch2011
> in QGIS on it's own in a fresh project.
>
> - Nathan
>
> On Tue, Oct 11, 2011 at 10:51 PM, Purves Ross <rmpurves at ntlworld.com>wrote:
>
>> Hi Nathan,
>>
>> OK - by counting the number of occurances of '<maplayer' in the project
>> file, I count 50 layers. Sounds a lot but there were no problems in 1.6 with
>> this number!
>>
>> Sorry to be stupid, not sure what you mean by load the file by itself. Are
>> you saying that there is a way of selectively loading layers on opening a
>> QGIS project file? Or do you mean opening the file in a text editor or
>> something. If the latter, then it certainly loads the XML OK and there's no
>> evidence that the file is corrupted.
>>
>> Thanks again for the help!
>> Cheers
>> Ross
>>
>>
>> On 11 October 2011 13:44, Nathan Woodrow <madmanwoo at gmail.com> wrote:
>>
>>> How many layers do you have in this project file?  And can you load the
>>> file by itself?
>>>
>>> - Nathan
>>>
>>>
>>> On Tue, Oct 11, 2011 at 10:35 PM, Ross Purves <RMP at lutonsfc.ac.uk>wrote:
>>>
>>>> Hi Nathan,
>>>>
>>>> Very many thanks for the quick response! OK, running from the command
>>>> line gives me slight more info, to be sure:
>>>>
>>>> [Tue Oct 11 13:34:26 RMPT43:NewMapMarch2011 ]$ qgis
>>>> VectorBackgroundMapMarch2011
>>>> Warning: loading of qgis translation failed
>>>> [/usr/share/qgis/i18n//qgis_en_GB]
>>>> Warning: loading of qt translation failed
>>>> [/usr/share/qt4/translations/qt_en_GB]
>>>> Warning: Couldn't load Python support library: Cannot load library
>>>> /usr/lib/qgispython: (/usr/lib/libqgispython.so: cannot open shared object
>>>> file: No such file or directory)
>>>> Critical: Data source is invalid
>>>> Critical:
>>>>
>>>> Additionally, when I start QGIS this way I get a pop up window within
>>>> the graphical interface that says:
>>>>
>>>> The layer
>>>> /mnt/bunker/ross/Research/PhD/NewMapMarch2011/VectorBackgroundMapMarch2011
>>>> is not a valid layer and can not be added to the map
>>>>
>>>> The strange thing is that I'm pretty certain there is no problem with
>>>> the project file. It's timestamp reads 22 April, when I last worked on it.
>>>> I.e. the version of QGIS has changed but my file has remained constant.
>>>>
>>>> Many thanks!
>>>> Ross
>>>> ________________________________________
>>>> From: Nathan Woodrow [madmanwoo at gmail.com]
>>>> Sent: 11 October 2011 13:26
>>>> To: Purves Ross
>>>> Cc: qgis-user at lists.osgeo.org
>>>> Subject: Re: [Qgis-user] QGIS 1.6 project causing 1.7 to crash
>>>>
>>>> Hi Ross,
>>>>
>>>> That sounds a bit strange.  Can you start QGIS from the terminal and see
>>>> what the output is when it locks up.
>>>>
>>>> - Nathan
>>>>
>>>> On Tue, Oct 11, 2011 at 10:19 PM, Purves Ross <rmpurves at ntlworld.com
>>>> <mailto:rmpurves at ntlworld.com>> wrote:
>>>> Hi there,
>>>>
>>>> I've updated my Ubuntu 10.10 installation to use QGIS 1.7. I put a lot
>>>> of work into a project using QGIS 1.6 but it won't open in 1.7. The layers
>>>> all appear but then the screen freezes as though QGIS is rendering the
>>>> resulting map forever.
>>>>
>>>> A bit of googling revealed that there was a bug at some point which
>>>> required the placement of 'gdal' between all <provider></provider> tags in
>>>> the project XML file in a scenario like this. However, I tried this and it
>>>> didn't work. I also have read various posts that say the use of 'on the fly'
>>>> project appeared to cause problems going between 1.6 and 1.7. The project in
>>>> question does indeed use on the fly projection.
>>>>
>>>> As a final note, I have an ECW raster layer in this map that requires
>>>> the modified GDAL to work. I thought that the crash might be to do with the
>>>> upgrade having removed my modified version of GDAL. I therefore recompiled
>>>> it all and have checked to see that my version of 1.7 can now read ECW files
>>>> and it can (when they are presented a a fresh layer and not as part of the
>>>> problematic project).
>>>>
>>>> This is a really, really important project to me and I do need to get it
>>>> back if at all possible. Please can anyone help?
>>>>
>>>> Very many thanks!
>>>> Ross Purves
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>>
>>>>
>>>
>>
>
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