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exception type: KeyError; exception message: u

edited August 2019 in Mousetrap


I am a new user to Open Sesame and I find myself trying to program a very basic mouse tracker experiment. I have followed the steps in the Mousetrap response item but when I run it an unexpected error stops the experiment. I will upload the experiment in case anyone knows how to solve this error.

The message on my screen is the following:


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