unexpected error message

When I try to start Audacity 2.0.2 I get an error message “Error while opening sound device. Please check the input device settings and the project sample rate.” I have not encountered this error message before, and cannot find any useful information on how to solve this problem in the manual. Thanks in advance for whatever help you can offer.


The Manual has a detailed FAQ addressing exactly this:
http://manual.audacityteam.org/man/FAQ:Errors#sound_device .