# CMAQ failing after rrtmg\_sw is called on two separate simulation months **URL:** https://forum.cmascenter.org/t/cmaq-failing-after-rrtmg-sw-is-called-on-two-separate-simulation-months/6069 **Category:** WRF-CMAQ **Tags:** cmaq **Created:** [November 18, 2025, 9:06pm UTC](https://forum.cmascenter.org/t/cmaq-failing-after-rrtmg-sw-is-called-on-two-separate-simulation-months/6069 "2025-11-18T21:06:35Z") **Posts on this page:** 1 **Showing post:** 3
### Author: ![Vlang](https://avatars.discourse-cdn.com/v4/letter/v/57b2e6/32.png) [@Vlang](https://forum.cmascenter.org/u/Vlang) #### Post date: [January 31, 2026, 2:16pm UTC](https://forum.cmascenter.org/t/cmaq-failing-after-rrtmg-sw-is-called-on-two-separate-simulation-months/6069/3 "2026-01-31T14:16:06Z")
Thank you for your reply, David! A quick update to this previous post. After updating [biogenic inputs](https://forum.cmascenter.org/t/systematically-high-pollutant-concentrations-of-rural-areas-in-coupled-wrf-cmaq-v5-5/6096), the model now has a slightly different error, but it still occurs within the first ~60 seconds of the run. I have enabled additional diagnostic flags, but so far, I am not seeing anything obvious in the logs that clearly explains the failure. The model advances through initialization and begins stepping, but aborts shortly thereafter. For reference, I have rechecked all inputs (emissions, ICBC, surface files, meteorology) and all files are present, non-empty, have expected time stamps, and are consistent with inputs from other successful runs. I am not able to upload the rsl output directly to the forum, but I am hosting the files on my [GitHub](https://github.com/Vlang11/CMAS_debug) page for reference. If anyone can provide suggestions or additional insight, I would greatly appreciate the guidance! -VL --- _[View the full topic](https://forum.cmascenter.org/t/cmaq-failing-after-rrtmg-sw-is-called-on-two-separate-simulation-months/6069)._