# MEGAN preprocessor does not exist

**URL:** <https://forum.cmascenter.org/t/megan-preprocessor-does-not-exist/6164>\
**Category:** MEGAN\
**Tags:** cmaq, emissions\
**Created:** [March 22, 2026, 11:44am UTC](https://forum.cmascenter.org/t/megan-preprocessor-does-not-exist/6164 "2026-03-22T11:44:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ominde](https://avatars.discourse-cdn.com/v4/letter/o/838e76/32.png) [@Ominde](https://forum.cmascenter.org/u/Ominde)\
**Post date:** [March 22, 2026, 11:44am UTC](https://forum.cmascenter.org/t/megan-preprocessor-does-not-exist/6164/1 "2026-03-22T11:44:18Z")

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Hello, everyone.

This page [[https://bai.ess.uci.edu/megan/data-and-code/megan32](https://bai.ess.uci.edu/megan/data-and-code/megan32) ] does not exist now, which offers the source code of MEGAN preprocessor, like prepmegan4cmaq\_grwform.f90.

I have downloaded the code and Inputs of MEGAN 3.21 from here: [UCI BAI - Data and Code](https://bai.ess.uci.edu/megan/data-and-code), but the preprocessor is not in them.

Would you like to send this package for me? Thanks a lot!

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**Author:** ![willison.jeff](https://avatars.discourse-cdn.com/v4/letter/w/c89c15/32.png) [@willison.jeff](https://forum.cmascenter.org/u/willison.jeff)\
**Post date:** [March 23, 2026, 1:36pm UTC](https://forum.cmascenter.org/t/megan-preprocessor-does-not-exist/6164/2 "2026-03-23T13:36:57Z")

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I’m not sure what’s going on with their website. Here is the preprocessor zip file that I downloaded from there.

> **[MEGAN32\_Prep\_Code\_Jan\_2022.tar](https://drive.google.com/file/d/1fy_F1uzvV3gBg2kRF7c_cKHmZ70wb30C/view?usp=drive_link)**
>
> Google Drive file.