Parsing intra-layer data

[rbetzel]

I'm modeling drosophila connectome data as a multiplex network (140k neurons with 6 different neurotransmitters -- synapse types). I wanted to try and use the multilayer variant of infomap. I've created a 'connectome.net' file following the 'intra' format. The code runs fine when I only include a few layers in the .net file. But when I extend to all six layers (tens of millions of lines in the .net file), I get the following error running the code:

'Error: Can't parse intra-multilayer link data from line '6 5'

I don't have clear insight as to what the issue might be, but I wonder if the multilayer infomap stops reading .net files after a fixed number of lines. Any insight would be appreciated.