Internal consistency checks can be performed on-line when option is activated. Additional information are then computed, e.g. system matrices theoritical properties checking, system matrices spectral signature, system resolution error norm, ...
The level of internal checks is specified by the internal checks mode option flag. Values are 0 (no checks), 1 (basic checks), 2 (deeper checks). However, the data assimilation run computational cost can increase significantly with the level of complexity of the internal checks.
1 ! Internal check mode (0|N)