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

[Purves Ross]

Hi Marco,

Very many thanks for this! In fact, the suggestions that you and Nathan
collectively made have got me a fair bit further with the problem. I
manually removed all the raster layers from my v1.6 project xml since I had
a feeling that these might have been related to the issue - thankfully there
were only three. The project then loads and the individual vector layers get
listed in the layer window pane in v1.7. However, QGIS still crashes before
the actual map is rendered. I then tried again but first turned 'rendering'
off using the tick box in the bottom right hand corner of the main screen.
The project then loads without crashing and I can then switch off all the
layers before turning rendering back on. Finally, I selectively switch each
layer on until they are all available. Probably what I'll do is manually go
through and export each of them in term so that I can re-import the lot into
a fresh 1.7 project. Bit of a mission though!

Thanks again
Cheers
Ross

On 11 October 2011 16:46, Marco Hugentobler <marco.hugentobler at sourcepole.ch
> wrote:

> Hi Ross
>
> An approach is to save a project with one raster layer with 1.7, then
> compare
> the layer xml with the one of the 1.6 version.
> Might be quicker compared to dropping layers one by one.
>
> If it still does not work, you could run QGIS with a debugger and see where
> it
> stops.
>
>
> Regards,
> Marco
>
>
>
> Am Dienstag, 11. Oktober 2011, 14.19:24 schrieb Purves Ross:
>  > 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20111012/0251636a/attachment.html>