Millisecond Forums

Hi there, when I use the delay discounting task (short term) and participants click on the letter B shortly before it starts to blink, they get the following error message. If you click on "close program" the task continues. There is no error log within inquisit and for the letter A this instance does not occur. I would appreciate your help very much. I attach a screenshot of the error and the paradigm I use.
Best Julia