The error value.undeclared

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/build/_plan.py:

  • what happened: {…} reads {…}, {…}, and nothing provides it: {…}the experiment declares no value

  • what to do: declare it with its reason: exp.declare({…}, {…}, reason="...")

• in mime/materials/_resolver.py:

  • what happened: {…}.{…} is derived from its parts, and nothing provides {…}{…}: the part has no material that holds it, and the experiment declares no value

  • what to do: give the part a material, or declare it: exp.declare({…}, ..., reason="...")

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