Dear all,

I need some advice. I am trying to conduct simulation using RegCM version 4.6.0 with the Kain-Fritsch cumulus scheme (over land and ocean). However, the model often complaints that:

POSSIBLE INSTABILITY IN KF CODE

MASS DOES NOT BALANCE IN KF SCHEME

NCOUNT = 1

Most of the time the model will continue without problem, but there were times where it will stop with error: "FATAL CALLED, Fatal in file: mod_cu_kf.F90 at line:". Restarting the model will sometime get past the simulation date when it broke, and then the simulation will continues until it later broke again with the same error.

May I know what might be the cause to this problem and how can I avoid it?

Thank you.

Best wishes,

Jing Xiang, C.