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Thanks Ruben, I think this is correct now.
Based on

( workflow_has_parameter AOD || [[ -z "$DISABLE_ROOT_OUTPUT" ]] || needs_root_output o2-emcal-cell-writer-workflow ) && ! has_detector_from_global_reader EMC && has_detector EMC && add_W o2-emcal-cell-recalibrator-workflow "--input-subspec 1 --output-subspec 0 --redirect-led"

The o2-emcal-reco-workflow produces the output in the spec that is used for the o2-emcal-cell-recalibrator-workflow as input. Since in the script the o2-emcal-cell-recalibrator-workflow always expects 1 as subspec for the input the o2-emcal-reco-workflow should have 1 as output.

Error while checking build/O2/fullCI_slc9 for 243f067 at 2026-03-03 14:04:

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