Hello, thank you for your messages. I tried changing "del writer" to "Delete(writer)". However, I get the following error now: Traceback (most recent call last): File "/scratch/mesh3mm/Z085_velocity_data.py", line 41, in <module> Delete(writer) File "/software/paraview/3.14.1/lib/paraview-3.14/site- packages/paraview/simple.py", line 426, in Delete servermanager.UnRegister(proxy) File "/software/paraview/3.14.1/lib/paraview-3.14/site- packages/paraview/servermanager.py", line 2672, in UnRegister raise RuntimeError, "UnRegistration error." RuntimeError: UnRegistration error.
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