ABC code errors not reported to user

[tr4npt]

I was not aware of my errors until I pasted my ABC into a web-based editor that highlighted my errors. I later discovered that the Messages window displayed these errors.

It would be helpful to have the error positions highlighted in the score window and/or code editor window, or at least show an indicator to have the user check the Messages window for error details.

[aupfred]

At the bottom lleft of the Window you should see a message stating that abcm2ps raised some errors.
Maybe need to be more visible though