Error after setting axial point

[VEZY]

plantscan3d 1.2.2 returns an error when trying to save the mtg to disk after setting a node to an axial point instead of a branching node. The error is reproducible on windows and mac os.

The file in question (in txt format instead of mtg because github refuses mtg format):

tree1538_c1_corr.txt

The node is here:

And when we zoom in:

PS: there's two arrows because the error happens for both nodes.

[VEZY]

Note that the error does not happen on plantscan3d 1.1.1