Hi Jaewon,

I am trying to integrate a wireless EEG recording (Emotiv 32 channel headset) into my task code.

At the beginning of the task script, I initialize the particular serial port (the virtual pair selected using a virtual serial port driver), specify the baudrate, parity etc. and 'fopen' it. At the end of the script, I 'fclose', 'delete' and 'clear' it.

When I run the code, for some reason, after about a trial, monkey logic closes with the error that the specific port is 'unavailable'. I tried deleting and switching to a different pair of virtual ports, but while a small test script of 'for' loop (2-3 mins) ran without errors, the monkey logic code was throwing up an 'unavailable port' error almost after a single trial.

Any thoughts on what could be going wrong?

Thank you!

There is not so much that I can tell without seeing the hardware configuration and the code. Maybe the port failed to reopen because it was still in use in the next trial. Try opening it again immediately after closing at the end of the timing script.

If it doesn't have to be opened and closed every trial, you may want to initialize it in the alert_function.
https://monkeylogic.nimh.nih.gov/board/read.php?2,6,6#msg-6

Initializing the port via the alert_function did help! Thank you so much, Jaewon!