Hi Mathieu,
Sorry for the delayed response, but I think I now have about as simple of a reproducer of the issue as I could come up with:
from paraview.simple import *
import os
class pv:
def __init__(self,casename):
print('Initializing...')
self.enReader = EnSightReader(registrationName='case1', CaseFileName=casename)
self.renderView = GetActiveViewOrCreate('RenderView')
def __del__(self):
print('deleting...')
Delete(self.enReader)
ResetSession()
def makeBlock(self):
print('Making block...')
self.extractBlock = ExtractBlock(registrationName='block', Input=self.enReader)
self.extractBlockDisplay = Show(self.extractBlock, self.renderView, 'UnstructuredGridRepresentation')
self.extractBlock.Selectors = ['booster']
def makePicture(self,picName):
pic_path = './'+picName+'.png'
print('Saving '+picName+'...')
layout = GetLayout()
layout.SetSize(1400,200)
if os.path.exists(pic_path):
os.remove(pic_path)
SaveScreenshot(pic_path, self.renderView, ImageResolution=[1400, 200], OverrideColorPalette='BlackBackground')
def main():
casename1 = '/path/to/case1/file.case'
casename2 = '/path/to/case2/file.case'
# This object completes fine
pv1 = pv(casename1)
pv1.makeBlock()
pv1.makePicture('pic1')
pv1.__del__()
print('pv1 done')
# The error below is a result of this object failing during makePicture
pv2 = pv(casename2)
pv2.makeBlock()
pv2.makePicture('pic2')
pv2.__del__()
print('pv2 done')
print('done')
if __name__ == '__main__':
main()
Which gives me the output:
Initializing...
VisRTX 0.1.6, using devices:
0: NVIDIA A40 (Total: 47.6 GB, Available: 47.1 GB)
Making block...
Saving pic1...
deleting...
pv1 done
Initializing...
Making block...
Saving pic2...
Traceback (most recent call last):
File "/path/to/script/replicateCrash.py", line 54, in <module>
main()
File "/path/to/script/replicateCrash.py", line 47, in main
pv2.makePicture('pic2')
File "/path/to/script/replicateCrash.py", line 26, in makePicture
layout.SetSize(1400,200)
AttributeError: 'NoneType' object has no attribute 'SetSize'
deleting...
Exception ignored in: <function pv.__del__ at 0x7fbae4b04940>
Traceback (most recent call last):
File "/path/to/script/replicateCrash.py", line 13, in __del__
ResetSession()
File "/path/to/paraview/ParaView-5.11.2-MPI-Linux-Python3.9-x86_64/lib/python3.9/site-packages/paraview/simple.py", line 120, in ResetSession
_initializeSession(connection)
File "/path/to/paraview/ParaView-5.11.2-MPI-Linux-Python3.9-x86_64/lib/python3.9/site-packages/paraview/simple.py", line 2689, in _initializeSession
raise RuntimeError ("'connection' cannot be empty.")
RuntimeError: 'connection' cannot be empty.
deleting...
Exception ignored in: <function pv.__del__ at 0x7fbae4b04940>
Traceback (most recent call last):
File "/path/to/script/replicateCrash.py", line 13, in __del__
ResetSession()
File "/path/to/paraview/ParaView-5.11.2-MPI-Linux-Python3.9-x86_64/lib/python3.9/site-packages/paraview/simple.py", line 120, in ResetSession
_initializeSession(connection)
File "/path/to/paraview/ParaView-5.11.2-MPI-Linux-Python3.9-x86_64/lib/python3.9/site-packages/paraview/simple.py", line 2689, in _initializeSession
raise RuntimeError ("'connection' cannot be empty.")
RuntimeError: 'connection' cannot be empty.
In the code below, if I remove the
layout = GetLayout()
layout.SetSize(1400,200)
The code will work fine, but the saved picture will look off. It’s a result of the GetLayout function returning a NoneType. Looking at the simple module source code and reproducing the wrapped servermanager commands for GetLayout, I see that the issue comes from the lproxy variable is returned as a NoneType
layout = GetLayout()
if not layout:
print('Using servermanager to get layout...')
view = GetActiveView()
lproxy = servermanager.vtkSMViewLayoutProxy.FindLayout(view.SMProxy)
layout = servermanager._getPyProxy(lproxy)
layout.SetSize(ImageResolution[0],ImageResolution[1])
This is where my debugging ends, as the find layout appears to be hidden in the vtkSMViewLayoutProxy C++ source code (from what I gathered here: https://www.paraview.org/paraview-docs/latest/cxx/classvtkSMViewLayoutProxy.html#a61b789886064420d4b545f1f9094eaf1)
This all seems to stem from the ResetSession() command as when I comment the command out, the code runs fine (and then my issue is with paraview not garbage collecting the ensight readers and my memory running out). Any help would be greatly appreciated!