Reenabling Mental Ray warning

[Anonymous]

I had accidentally checked the "do not show this message again in the future" when the mental ray popup warning came in Maya 2019. Is there a way to reenable this warning so I can be notified of bad nodes without nuking my preferences?

[Stephen.Blair]

optionVar -iv "showMentalRayNotAvailableDialog" 1

You can stick in the prefs\userPrefs.mel