SNICAR wormhole error with CESM1.2 CLM4.0

[umerkel@marum_de]

I am running CESM1.2.2 in the B1850_CAM5 compset using CLM4.0.
After some months, the model crashes with the following error message

SNICAR ERROR: FOUND A WORMHOLE. STUCK IN INFINITE LOOP!

coming from the SNICARMod.F90 routine.

Maybe someone has an idea what could lead to such an error?
Thank you in advance
Ute

 

[oleson]

I've searched the issues on the CTSM github site and found this:

code should error on missing mxsoil_color when SOIL_COLOR is used · Issue #272 · ESCOMP/CTSM

This bug only manifests under unique circumstances, namely when using a custom surface dataset and the variable mxsoil_color has accidentally been forgotten (this happened to me due to a bug or "fe...

github.com

In that case the error seems to be related to the use of a surface dataset that doesn't have mxsoil_color on it.

Another possibility is that the radiation scheme in CAM is providing some bad values of solar radiation to CLM (e.g., negative) and it's showing up as an error in the SNICAR routine.

 

[umerkel@marum_de]

Dear Keith,
Thank you very much, I will further check along these lines.
Best regards
Ute