Fix stencil plot

8 jobs for change-loop-variable-type in 21 minutes and 53 seconds (queued for 3 seconds)
Name Stage Failure
failed
pycodegen-integration Test
=========================== short test summary info ============================
FAILED pygrandchem_tests/test_benchmark.py::test_benchmark - ValueError: Addi...
============= 1 failed, 8 passed, 344 warnings in 76.76s (0:01:16) =============
Uploading artifacts for failed job
Uploading artifacts...
pycodegen/*/report.xml: found 3 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=523773 responseStatus=201 Created token=3RnBWhgv
Cleaning up file based variables
ERROR: Job failed: exit code 1