Error: Path must be a string. Received undefined

[olafdraeger]

when trying to run the eurlex example command:
eurlex -vu -l de,en,fr COM:2012:0011:FIN -o eurlex-com-2012-0011-fin.json
i get the following error:
Error Path must be a string. Received undefined

[yetzt]

which node version do you use? the code was produced quite some time ago, when node.js 0.8 was still a thing.

[Rodesc]

Same error, did you manage to get results?