Routine/image component skipped when "random" loop type is selected but not when "sequential"

[neurowink]

I’m running a (currently) simple task in version 2024.2.4 (compatibility version) on Windows 11.

In this task, a fixation (1000ms) is followed by a blank screen (static ISI component) for 300ms and then an image is presented for 1000ms. The image changes every repeat and is set to pre-load during the ISI.

If the loop type set in the trial loop is sequential, the images display correctly without issue with accurate timing. However, if I use random (which is what I need) then many of the images never display and in the output csv file is just says their filename is none. I don’t get any errors. Currently, this is a very simple task but I aim to add in eyetracking later. All of these are images I have used in a prior task in psychopy without issue so I’m concerned that so many are skipped.

Originally, I had the ISI in a separate routine which didn’t help. I also have set the object to only display when the ISI is completed which doesn’t help either.

Why might changing the loop type cause this and how can it be fixed?

[neurowink]

I’ve tried printing the object file name to the console, and you can see it sometimes fails to grab the filename.

[wakecarter]

Wakefield's Daily Tips

Check for blank rows in your spreadsheets It is all too easy to end up with blank rows or columns in a spreadsheet. If you highlight cells and then press delete, you are removing the contents from the cells, not deleting them altogether. If you experience blank trials or errors at random points in a loop then blank rows are a likely culprit. If you set the loop type to sequential, then the error will probably happen after your expected trials. You can tell how many rows your spreadsheet has by …

[neurowink]

Oh wow! Such a simple solution - thank you!! Working perfectly now!