Error occurs when using print_strings() for twisted type D affine algebras

[Ameilia]

Hi all,

Does anyone have any idea why the following codes don't work?

Lambda = RootSystem(['D',3,2]).weight_lattice(extended=true).fundamental_weights()
V = IntegrableRepresentation(Lambda[2])
V.print_strings(depth=5)

It gives "AssertionError: m: error - failed to compute m(1, 1, 1)".

I believe that the same code works for any other type of root systems except for $$D_{n+1}^{(2)}$$...

Many thanks,

Ameilia