[Qgis-user] Graphic modeler crashing

[Laurence Béchet]

Hi,

I was trying to re create a model with qgis3 (models made with qgis2 not 
being supported) when I started getting python error messages. I don't 
understand them. I finally closed my project and reloaded it again.

Now when I try to edit the model, it crashes automatically and I cannot 
edit it at all.
An error has occurred while executing Python code:

KeyError: ''

Traceback (most recent call last):   File 
"C:/OSGEO4~1/apps/qgis-ltr/./python/plugins\processing\modeler\ModelerDialog.py", 
line 716, in openModel     self.loadModel(filename)   File 
"C:/OSGEO4~1/apps/qgis-ltr/./python/plugins\processing\modeler\ModelerDialog.py", 
line 725, in loadModel     self.repaintModel()   File 
"C:/OSGEO4~1/apps/qgis-ltr/./python/plugins\processing\modeler\ModelerDialog.py", 
line 741, in repaintModel     self.scene.paintModel(self.model, 
controls)   File 
"C:/OSGEO4~1/apps/qgis-ltr/./python/plugins\processing\modeler\ModelerScene.py", 
line 142, in paintModel     sourceItems = 
self.getItemsFromParamValue(source, alg.childId(), context)   File 
"C:/OSGEO4~1/apps/qgis-ltr/./python/plugins\processing\modeler\ModelerScene.py", 
line 74, in getItemsFromParamValue     
items.append((self.paramItems[value.parameterName()], 0)) KeyError: ''


Although I could start from scratch again, I find it a nuisance not 
being able to edit the model. Any suggestions are welcome ;o)

QGIS 3.4.13 and 3.10.0 (same behaviour)
Windows 8 pro 64 bits

Kind regards
*Laurence Bechet**
**ARK IN THE PARK Volunteer Co-Ordinator*
*Cascades Ranger Station
**Falls Road, Waitakere
Auckland
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