The error parts.density

user: the script can change it: the error says what happened in the experiment’s names, and what to write instead.

Where MIME gives it, with what its message says happened and what its action says to do ({…} is filled in from the experiment):

• in mime/things/_parts.py:

  • what happened: body {…}'s mass and inertia are derived from its parts, and {…} has no density

  • what to do: give {…}.parts.<part>.density: a record that holds it, Part(..., material=Record(...)), or declare it, exp.declare(...)

Reading an error and reaching its full traceback: reading an error. Every code: the index.