are you reloading processing plugin? the temporary path of processing are
statically set once (c++ static var in QgsProcessingUtils) for qgis session
=> if you reload the processing plugin without exitig processing (e.g. to
update the list of scripts), the oldtemp folder is no more available but
still referenced => generating strange errors at the end of any process.
Just rerun qgis to check if this is the problem.
There is no easy fix other that avoid static variable end method (e.g.
refactoring) of QgsProcessignUtils, bts is not a common use case errors,
but only happens to script developers => no fix is necessary.
Luigi Pirelli
**
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*
https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
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On Mon, 3 Sep 2018 at 16:52, matteo wrote:
> Hi all,
>
> I was thinking to add a small example of addLayerToLoadOnCompletion
> function to the ScriptTemplate of Processing. The code is the following:
>
> buffered_layer = processing.run("native:buffer", parameters={
> 'INPUT': dest_id,
> 'DISTANCE': 1,
> 'SEGMENTS': 5,
> 'END_CAP_STYLE': 0,
> 'JOIN_STYLE': 0,
> 'MITER_LIMIT': 2,
> 'DISSOLVE': False,
> 'OUTPUT': 'memory:'
> }, context=context, feedback=feedback)['OUTPUT']
>
> feedback.pushDebugInfo(str(dest_id))
>
> context.addLayerToLoadOnCompletion(buffered_layer.source(),
> context.LayerDetails(
> name='new_layer',
> project=context.project()
> ))
>
> but Processing always throws this error:
>
> The following layers were not correctly
>
> generated.Polygon?crs=EPSG:3003&field=ID:long(10)&field=fk:string(254)&field=ROTAZ:long(10)&field=DIMENS:long(10)&field=ETICHETTA:string(254)&field=VALORE:long(10)&field=T_MIN:double(20,5)&field=T_MAX:double(20,5)&field=PIOGGIA:double(20,5)&field=LARGH:double(20,5)&field=LUNG:double(20,5)&field=assex:string(254)&field=assey:string(254)&field=colore:string(38)&field=xlab:double(10,2)&field=ylab:double(10,2)&field=raster:double(23,15)&field=raster_1:double(23,15)&field=raster_2:double(23,15)&uid={685540af-711d-462b-a9d0-9b00af4c2f6a}You
> can check the 'Log Messages Panel' in QGIS main window to find more
> information about the execution of the algorithm.
>
>
> Am I missing something?
>
> Thanks for any suggestion
>
> Matteo
>
>
>
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