**Version** * `nodejs v6.10.2` * `json-schema-to-typescript@4.2.1` **Code** ``` $ cat test.json {} $ cat test.json | node_modules/.bin/json2ts Path must be a string. Received undefined $ echo $? 1 ``` **Expected behavior** No errors. Looks like this is problem with strict argument checking in `path` module which was introduced in nodejs 6: https://github.com/nodejs/node/pull/5348