Calibration output drowns in native info lines #1679

Description

A calibration (OMSimulator --calibrate, OMSimulator.calibration) simulates the model once per evaluation, and every evaluation prints the native info: lines of the simulation:

info:    maximum step size for 'model.root': ...
info:    No result file will be created
info:    Final Statistics for 'model.root':
...

The DC motor calibration (485 evaluations) prints 2586 lines; the calibration's own info: evaluation N: cost ... lines and the final summary are lost between them, also in the OMEdit Calibrate dialog (OpenModelica/OpenModelica#17359). Info messages cannot be silenced from Python today.

Expected

A way to turn the native info messages off (or down) from Python, used by the calibration for its evaluations, so only its own progress lines and summary are printed.

Related

Follow-up of #1674 / #1675.

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