I'm using Jhipster 4.5.3 to generate some code from a JDL file I've created. Because I couldn't generate anything, I took the JDL Blog sample ... and I have the same issues. The JDL documentation still mentions : You can generate entities from a JDL file by running jhipster import-jdl your-jdl-file.jh But when I do that I get : The jdl is being parsed. { name: 'NullPointerException', message: 'The parsed JDL content and the database type must be passed.', Looking at the code , it looks like we have to pass a new parameter, the database type (this is not mentioned in the doc BTW). Looking at