# AERO process in Process Analysis

**URL:** <https://forum.cmascenter.org/t/aero-process-in-process-analysis/2868>\
**Category:** Chemistry and Aerosols\
**Created:** [December 9, 2021, 2:57pm UTC](https://forum.cmascenter.org/t/aero-process-in-process-analysis/2868 "2021-12-09T14:57:06Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Ben\_Murphy](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Ben\_Murphy](https://forum.cmascenter.org/u/Ben_Murphy)\
**Post date:** [January 3, 2022, 4:22pm UTC](https://forum.cmascenter.org/t/aero-process-in-process-analysis/2868/2 "2022-01-03T16:22:04Z")

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Hi HyeonYeong,

There was a bug in process analysis for aerosols introduced in v5.3. It is resolved in v5.3.3 – see Release Note 15 here ([CMAQ/CMAQv5.3.3\_bugfixes.md at 5.3.3+ · USEPA/CMAQ · GitHub](https://github.com/USEPA/CMAQ/blob/5.3.3%2B/DOCS/Release_Notes/CMAQv5.3.3_bugfixes.md)).  
Do you still get negative values with this corrected version?

Best wishes,  
Ben Murphy

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