Using Qgis 2.14.12 and Pyqgis,
i get a error message when executing the following: `processing.runalg('grass7:v.surf.idw', layer, 18, 2.0, 'p', True, "%f, %f, %f ,%f"%(1.635, 1.813, 50.896,  51.0205), 0.005, -1, 0.001, "e://out.tif")`
<br><br>

layer.isValid() is true <br>
But I get this error (warning) in the console :

> C:\PROGRA~1\QGIS2~1.14\bin>g.region n= 51.020500 s= 50.896000 e= 1.813000 w=1.635000 res=0.005
			
			Sorry, <51.020500> isn't a valid option
			
			Sorry, <50.896000> isn't a valid option
			
			Sorry, <1.813000> isn't a valid option

This results in a 1 ko raster at lat/lon 0/0. <br>
However when I launch the function from the Qgis toolbox, the output is fine.

I've tried both with grass 6 & 7

Any ideas?