Dear NEMO Developers,

I am writing to report an issue in NEMO where optimizing fuels other than electricity results in errors and crashes. This behavior was not observed in previous NEMO releases.

I have attempted optimizing with multiple non-electric fuels, but all attempts were unsuccessful. Switching back to electricity as the fuel resolves the issue.

I kindly request clarification on whether this is an intentional restriction or an unintended error. If it is an error, I would appreciate its inclusion in a future NEMO release.