A bug that may occasionaly have created unstable results during rapid water flows in frozen soil is deleted.
The bug has been since the introduction of CoupModel 5.0 (2013).
The water flow from the low flow domain of a layer of unfrozen soil into a high flow domain of frozen soil below was linked to the the wrong horizon (one layer to deep – actually creating a water flow from the frozen horizon to the next deeper horizon – instead of water flow from non frozen to frozen layer)