[Paraview] Paraview pipeline error in python

[Shuhao Wu]

Hello,

Is there a way to get errors that occurred while updating a pipeline in 
Python? I noticed that if I missed the option of 
GradientOfUnstructuredDataSet.ScalarArray, paraview will emit an error 
to STDOUT when I call UpdatePipeline. However, my python code continues 
to execute and then end up with the wrong data.

Is there a way to get the error and quit when I call UpdatePipeline?

Thanks,
Shuhao