Directed graph not discovered

[nnfm58]

I would like to point out that some directed graphs are not being discovered by the algorithm. Input example:

t # 0
v 0 2
v 1 1
v 2 3
e 0 1 1
e 2 0 2
t # -1

With a support =1, the algorithm outputs as frequent the subgraphs with 2 vertices but the algorithm seems not to generate the candidate with 3 vertices. Is there something I am missing? The following is the code's output:

t # 0
v 0 2
v 1 1
e 0 1 1

t # 1
v 0 3
v 1 2
e 0 1 2

Thanks in advance for your time.

[m1zhangjh]

I found the same problem. If the directed edge's frm.vlb > to.vlb, the subgraph mining does not consider it in get_forward_XXX_edges

[nnfm58]

did you find a solution?