problem with felling1tree ?

[GeraldineDerroire]

I had problem runing a simulation that had winching == 0 and directionalfelling == 2. I get the following
Erreur dans felling1tree(., fuel = fuel, winching = winching, directionalfelling = directionalfelling, : objet 'FallenTree' introuvable
Looking quickly at the code of the function felling1tree, I have the impression that this is because we are neither in the case of line 883, nor in the case of line 891. But that needs to be checked.
But does that make sense to have directionnalfelling == 2 when the trail goes to the foot of the tree ? probably not. If not => add an error message.

Here the full information on what doesn't work. I run the following manual scenario on ParacouP6, with a seed set to 42: