I have mathematica 10 and 8 on different computers. Version 8 always shows me the error message about what goes wrong while I don't see any error message in version 10. I find it quite inconvenient as it take much time to figure out the problem. How to switch on error messages in version 10 ?

I remember that version 10 did show the warning messages, but somebody calculated something using my mathematica and all error messages were gone after that.

  • $\begingroup$ Does executing On[] help? $\endgroup$
    – Karsten7
    Mar 20, 2015 at 7:36
  • $\begingroup$ yes, it turns on some message if I know what kind of messages it is. Do I have to turn them on 1 by 1? $\endgroup$
    – mastrok
    Mar 20, 2015 at 8:23
  • 2
    $\begingroup$ You can try going to the menu bar Edit ▶ Preferences... and click "Reset to Defaults" under the Messages tab. $\endgroup$
    – Karsten7
    Mar 20, 2015 at 9:03
  • $\begingroup$ I solved it and thank you very much. $\endgroup$
    – mastrok
    Mar 20, 2015 at 9:11
  • $\begingroup$ After your code add // Quiet. $\endgroup$ Mar 20, 2015 at 10:21

1 Answer 1


One thing to check is what message options are set under Global Preferences in the Option Inspector. In particular, "KernelMessageAction" should be set to "PrintToNotebook". See window capture below.



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