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The following is an example of the error mpicasa produces when running in HTCondor and when ${HOME}/.matplotlib isn't already populated. This happens when, for example, when we set HOME=${HOME:=$TMPDIR} because we are running on a remote site or simulating it. We have to set HOME to something because mpicasa expects it HOME and HTCondor doesn't set HOME by default.
After many attempts Attempting to get matplotlib to generate its own .matplotlib , the results were always inconsistentproduced inconsistent results. So , the solution was to add a poplulated populated .matplotlib directory to transfer_input_files for each DAG or job.
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