issue with converting models to sbml (sbml2model function)

[martamatos]

While trying to reproduce an old problem, I noticed that if I try to build a very simple model and convert it to SBML, it crashes due to some units problem.

The notebook is also attached.
build_simple_model.zip

[avsastry]

Didn't account for unitless systems. Fixed in 1cb3cbe

[martamatos]

I'm sorry, this bug report was incomplete, the function also crashes when I: 1) import a model from an sbml file and 2) try to convert model the model back to sbml:

The ultimate goal is to do some changes on the model and then export it to sbml and use it on Copasi.

The model and the notebook are attached.
sbml2model_smallbone.zip