# Difficulties to install WRF-CMAQ

**URL:** <https://forum.cmascenter.org/t/difficulties-to-install-wrf-cmaq/4162>\
**Category:** CMAQ\
**Created:** [June 12, 2023, 1:28am UTC](https://forum.cmascenter.org/t/difficulties-to-install-wrf-cmaq/4162 "2023-06-12T01:28:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![iara](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@iara](https://forum.cmascenter.org/u/iara)\
**Post date:** [June 12, 2023, 1:28am UTC](https://forum.cmascenter.org/t/difficulties-to-install-wrf-cmaq/4162/1 "2023-06-12T01:28:30Z")

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Hello everybody.  
I was able to install cmaq version 5.4 but I wanted to install the couple version WRF-CMAQ.  
Reading the instructions I was confused.  
Do I need to install WRF4.4 before CMAQ5.4? From what I’ve seen of the code, when the set build\_twoway option is activated, a directory with the WRF executables is created.  
Can I use the same libraries I used for the uncoupled version?  
Thanks for help.

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**Author:** ![lizadams](https://avatars.discourse-cdn.com/v4/letter/l/49beb7/32.png) [@lizadams](https://forum.cmascenter.org/u/lizadams)\
**Post date:** [June 12, 2023, 2:29pm UTC](https://forum.cmascenter.org/t/difficulties-to-install-wrf-cmaq/4162/2 "2023-06-12T14:29:06Z")

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There is a tutorial with instructions to install WRF-CMAQ available here:

> <https://github.com/USEPA/CMAQ/blob/main/DOCS/Users_Guide/Tutorials/CMAQ_UG_tutorial_WRF-CMAQ_Benchmark.md>

When the bldit\_cctm.csh script is modified according to the instruction, and run, then both CMAQ and WRF will be compiled and linked together.

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**Author:** ![iara](https://avatars.discourse-cdn.com/v4/letter/i/977dab/32.png) [@iara](https://forum.cmascenter.org/u/iara)\
**Post date:** [June 14, 2023, 12:31pm UTC](https://forum.cmascenter.org/t/difficulties-to-install-wrf-cmaq/4162/3 "2023-06-14T12:31:00Z")

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I will try to compile with your suggestions. Thank you for help @lizadams