For langauge specific execution try the following combinations of input file and code embedding file
C++ : Cppdata.txt or Cppdata2.txt and cpp2vec.txt
Java : Javadata.txt and java2vec.txt
C# : Csdata.txt and java2vec.txt or cpp2vec.txt
As the code contains relative paths, place all files in the same folder which is the current working directory for the python code.
Vuldeepecker code was used for the base code.