Hi everyone,
When I use the geotraitement widget in web appbuilder for ArcGIS developper edition I get this error. 
For the widget configuration, I have added a GP Service. This GP Service is for Downstream and Upstream tasks applied to a geometric network.
Can anyone help me about this ?
Thank you
I'm using:
ArcGIS for Server 10.3
Web AppBuilder for ArcGIS developper edition 1.3