[Qgis-developer] Re: Fwd: [Qgis-user] QgsVectorLayer causes "Failed to load" error

[Marco Bernasocchi]

Hi Carson, I had a similar problem but launching qgis (I still have to 
start it by using a script) and solved it by doing:

LIBUTIL=$(locate -r libutil.so$)
LD_PRELOAD=$LIBUTIL #use locate libutil to find the path
export LD_PRELOAD

maybe it helps (was suggested in this list a while ago).

BTW anybody has an idea why this would happen?

ciao
Marco

On 06/16/2011 01:54 PM, Carson Farmer wrote:
> I'd like to 'second' this observation. No matter what combination of
> PYTHONPATH, LD_LIBRARY_PATH etc I try, I can't seem to get this
> working either. I'm forwarding this thread to the developers mailing
> list as well. Any suggestions? I've never had this problem before,
> though I'm sure its something I'm doing :-p
>
> Carson
>
> #####################################################
>
> Hello,
>
> I know this problem has been discussed many times, but the usual
> remedies are not working.
>
> First I run the following commands from the shell:
>
> export LD_LIBRARY_PATH=/usr/local/qgis/lib
> export PYTHONPATH=/usr/local/qgis/share/qgis/python
>
>
> Then I run the following program:
>
> from qgis.core import *
>
> qgis_prefix = '/usr/local/qgis/'
>
> QgsApplication.setPrefixPath('/usr/local/qgis/', True)
> QgsApplication.initQgis()
>
> vlayer=QgsVectorLayer('./tl_2009_09001_faces.shp','tl_2009_09001_faces','ogr')
> print vlayer.isValid()
>
>
> I get the error message "Failed to load".
>
> I am using the 1.18 debian packages.  It works fine if I run these
> commands from the python console in qgis.  Any suggestions?  Thanks.
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