If you have not submitted an issue to LMFIT before, first read https://github.com/lmfit/lmfit-py/blob/master/.github/CONTRIBUTING.md.
DO NOT USE GITHUB ISSUES FOR QUESTIONS
Use the Mailing list https://groups.google.com/group/lmfit-py for questions about LMFIT.
If you ignore this and do post a question as a Github Issue anyway, the Issue will be closed and not answered.