Hello, I’m trying to build my experiment on builder, it’s essential for me to insert a loop from drop down menu, but when I try to do it, I need to specify loop elements first and it raises an error:
Traceback (most recent call last):
File “C:\Program Files\PsychoPy3\lib\site-packages\psychopy\app\builder\flow.py”, line 284, in insertLoop
startII = self.gapMidPoints.index(min(self.entryPointPosList))
ValueError: min() arg is an empty sequence
When I click ‘Insert Loop’ button in the flow menu, it lets me set the loop position first, then specify loop elements, and it works perfectly. How could I achieve this from the drop down menu? It used to work before, now it doesn’t work anymore. Any suggestions? Thank you!