<span style='font-family:Verdana'><span style='font-size:12px'>Thanks, it worked just like you said!<br /> 
<br /> 
But adding back the variables I had in PYTHONPATH<br /> 
<br /> 
C:\Python27\Lib<br /> 
C:\Python27\DLLs<br /> 
C:\Python27\Lib\lib-tk<br /> 
C:\mapnik-2.0.1rc0\python\2.7\site-packages<br /> 
<br /> 
Made Sextante stop working on QGIS 1.9.<br /> 
<br /> 
Then I removed the first 3 ones and left only the last.<br /> 
Now Mapnik and Sextante both work.<br /> 
<br /> 
Don't know why I added these first three variables, I read somewhere that they are needed, but it doesn't seem so.<br /> 
<br /> 
Thanks a lot!<br /> 
<br /> 
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                <span style="font-family:Verdana"><span style="font-size:12px">----- Original Message -----</span></span></p> 
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                <span style="font-family:Verdana"><span style="font-size:12px">From: Nathan Woodrow</span></span></p> 
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                <span style="font-family:Verdana"><span style="font-size:12px">Sent: 01/31/13 02:32 PM</span></span></p> 
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                <span style="font-family:Verdana"><span style="font-size:12px">To: Stephane Goldstein</span></span></p> 
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                <span style="font-family:Verdana"><span style="font-size:12px">Subject: Re: [Qgis-user] QGIS and Python Errors</span></span></p> 
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                                <font face="arial, helvetica, sans-serif">The error you are getting there is to do with the API change in 1.9 (the dev version). If you change </font></div> 
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                                <font face="arial, helvetica, sans-serif"><span style="color:rgb(0,0,0)">QgsMapLayerRegistry.instance()</span><span style="color:rgb(0,0,0)">.addMapLayer(layer)</span></font></div> 
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                                <span style="color:rgb(0,0,0)"><font face="arial, helvetica, sans-serif">to </font></span></div> 
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                                <font face="arial, helvetica, sans-serif"><span style="color:rgb(0,0,0)">QgsMapLayerRegistry.instance()</span><span style="color:rgb(0,0,0)">.addMapLayers([layer])</span></font></div> 
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                                <span style="color:rgb(0,0,0)"><font face="arial, helvetica, sans-serif">it will work again.</font></span></div> 
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                                <span style="color:rgb(0,0,0)"><font face="arial, helvetica, sans-serif">QGIS will use the Python installed with OSGeo4W, I don't think also having standalone copy of Python installed will cause any issues. </font></span></div> 
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                                <font color="#000000" face="arial, helvetica, sans-serif">- Nathan</font></div> 
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