Do not allow pressure drop ahead of stage for simplified variable speed trains: Defining PRESSURE_DROP_AHEAD_OF_STAGE for a simplified variable speed train does not have any effect. eCalc now gives an error if specified, instead of ignoring it.
Do not allow control margin for simplified variable speed trains: Defining CONTROL_MARGIN for a simplified variable speed train does not have any effect. eCalc now gives an error if specified, instead of ignoring it.
Do not allow 0 efficiency in input chart: Give earlier feedback to user, and point to the relevant file.
Make sure that pressure calculation tolerances are the same at different places in the code: Can give minor result changes because the calculation is more accurate (adding iterations in the calculation of the outlet pressure of a compressor stage).