AssertionError: Tuple{HierarchicalSoftmaxNode,Int64}[]

[rhowardstone]

Hello! I'm trying to train AdaGram models, but do not have much experience in Julia - I've tried to follow the installation instructions, but keep getting this error when running train.sh or train.jl on my test files:

~/.julia/packages/AdaGram/bGnM5$ julia train.jl ../test/corpus.txt ../test/vocab.txt ../test/model.pkl
Building dictionary... ERROR: LoadError: AssertionError: Tuple{HierarchicalSoftmaxNode,Int64}[]
Stacktrace:
[1] build_huffman_tree(::Array{Int64,1}) at /home/username/.julia/packages/AdaGram/bGnM5/src/softmax.jl:62
[2] VectorModel(::Array{Int64,1}, ::Int64, ::Int64, ::Float64, ::Float64) at /home/username/.julia/packages/AdaGram/bGnM5/src/AdaGram.jl:105
[3] #read_from_file#21(::Regex, ::typeof(read_from_file), ::String, ::Int64, ::Int64, ::Float64, ::Float64, ::Int64, ::Int64, ::Set{AbstractString}) at /home/username/.julia/packages/AdaGram/bGnM5/src/util.jl:32
[4] (::AdaGram.var"#kw##read_from_file")(::NamedTuple{(:regex,),Tuple{Regex}}, ::typeof(read_from_file), ::String, ::Int64, ::Int64, ::Float64, ::Float64, ::Int64, ::Int64, ::Set{AbstractString}) at ./none:0
[5] top-level scope at /home/username/.julia/packages/AdaGram/bGnM5/train.jl:97
[6] include at ./boot.jl:328 [inlined]
[7] include_relative(::Module, ::String) at ./loading.jl:1105
[8] include(::Module, ::String) at ./Base.jl:31
[9] exec_options(::Base.JLOptions) at ./client.jl:287
[10] _start() at ./client.jl:460
in expression starting at /home/username/.julia/packages/AdaGram/bGnM5/train.jl:97

Am I doing something wrong? I've tried several different versions of Julia, but keep getting this error, sometimes a slightly different one involving a 'EOF error', depending on the version used.

Thank you!