Some Parallel Port Components were Skipped

OS (e.g. Win10): Win 10
PsychoPy version (e.g. 1.84.x): V 2022.2.2
Standard Standalone? (y/n) If not then what?:y

In my experiments, I’m using the parallel port component to send triggers to an EEG device, but some triggers are inexplicably skipped. I have checked the time records for these components and their start times are blank in the data file. My parallel port component was placed in a separate routine and it only lasted 1 frame. That is, in this routine, there is only the parallel port component.

At first, I suspected it might be caused by the monitor dropping frames since I set the component to sync with the screen refresh. But then I think that even if the screen dropped frames, the component should continue to run, just a little later than expected.

If anyone knows how this problem happened, and how it can be fixed, I would appreciate it.

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