# Tracer namelist in CMAQ5.2

**URL:** https://forum.cmascenter.org/t/tracer-namelist-in-cmaq5-2/1377
**Category:** CMAQ
**Created:** [March 21, 2020, 12:33am UTC](https://forum.cmascenter.org/t/tracer-namelist-in-cmaq5-2/1377 "2020-03-21T00:33:27Z")
**Posts on this page:** 1
**Showing post:** 13

<div class="post-metadata">

### Author: ![lifenx](https://avatars.discourse-cdn.com/v4/letter/l/c0e974/32.png) [@lifenx](https://forum.cmascenter.org/u/lifenx)
#### Post date: [February 3, 2023, 3:07pm UTC](https://forum.cmascenter.org/t/tracer-namelist-in-cmaq5-2/1377/13 "2023-02-03T15:07:12Z")

</div>

Hello Mahshid,

I have a problem similar to yours, and I would like to ask you how to solve it.

 ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/8/8b340c45df70898e6f6736b0036b4f01a16fbf7d.png)

I use the CMAQ-PFAS version, which adds some species based on CMAQ5.3.2, the mechanism is cb6r3\_ae7\_aq, HFPODA exists in GC\_cb6r3\_ae7\_aq.nml.

I would appreciate your help.

---

_[View the full topic](https://forum.cmascenter.org/t/tracer-namelist-in-cmaq5-2/1377)._