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

[Giuseppe Sucameli]

Hi all,

if I run the following code from a terminal:

brushtyler at Joe-Notebook:~$ python
>>> from qgis.core import *
>>> QgsApplication.setPrefixPath('/usr/local/qgis/', True)
>>> QgsApplication.initQgis()

I get

/home/brushtyler/projects/sources/qgis/src/core/qgsproviderregistry.cpp: 84:
(QgsProviderRegistry) Checking /usr/local/qgis//lib/qgis/plugins for
provider plugins
/home/brushtyler/projects/sources/qgis/src/core/qgsmessageoutput.cpp: 65:
(showMessage) No Data Providers:
/home/brushtyler/projects/sources/qgis/src/core/qgsmessageoutput.cpp: 69:
(showMessage) No QGIS data provider plugins found in:
/usr/local/qgis//lib/qgis/plugins
No vector layers can be loaded. Check your QGIS installation

As far as you can see, the QgsApplication searches providers in
/usr/local/qgis//lib/qgis/plugins
but in my local installation the qgis providers are in
/usr/local/lib/qgis/plugins

So just changing the code above to

>>> from qgis.core import *
>>> QgsApplication.setPrefixPath('/usr/local/', True)
>>> QgsApplication.initQgis()

and providers are loaded well  :)
I hope this helps.

Cheers.

On Wed, Jul 6, 2011 at 1:12 PM, leonidas <leonidas_liakos at yahoo.gr> wrote:

> I also have the same problem like Brian. Did anyone found the problem?
>
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-- 
Giuseppe Sucameli
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