# Creating lists from a stimulus group **URL:** \ **Category:** Support\ **Created:** [November 30, 2016, 9:42pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429 "2016-11-30T21:42:44Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [November 30, 2016, 9:42pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/1 "2016-11-30T21:42:44Z")
I’m working on a program that will show stimuli at 9 locations, and 3 sizes. I’ve created a list that contains the stimulus group, and range replicators for the x coordinates, y coordinates, and size of the stimuli. However, once I have the list complete, the program cannot display all of the stimuli and I get an error that says: “ERROR: Stimulus image is not loaded. Displaying nothing.” I do not believe there is a problem with the stimuli themselves, since they appear properly when called without the replicators. I’ve attached the program in question. Thank you, Brittany ---
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [December 1, 2016, 1:04pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/2 "2016-12-01T13:04:26Z")
Hi Brittany, I didn’t receive your experiment XML. Can you try sending it again? Thanks, Chris Stawarz ---
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [December 1, 2016, 1:53pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/3 "2016-12-01T13:53:26Z")
Here you go ---
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [December 1, 2016, 1:53pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/4 "2016-12-01T13:53:26Z")
Attachment: [RSVP\_RadFreq\_Gratbased4.xml](https://mworks.discourse.group/uploads/short-url/gqZPoeaKQFhTTzqp6sh3enzCrkP.xml) (59.1 KB) ---
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [December 1, 2016, 2:37pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/5 "2016-12-01T14:37:00Z")
Hi Brittany, I think I see the problem. You’re selecting images using the `index` variable (to which a range replicator is assigning integers 1 to 128). You correctly use `index-1` when loading each image (`RadFreq_images[index-1]`, at line 314). However, when you queue and dequeue the image (lines 370, 380, 402), you use a different index (`RSVP_stim_index_RadFreq`), when you should again be using `index-1`. If you fix that error, it looks like you can remove `RSVP_stim_index_RadFreq` (a selection variable) and any associated actions entirely. It appears to serve no purpose in your experiment; I assume it’s a vestige of another protocol. Cheers, Chris ---
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [December 1, 2016, 3:06pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/6 "2016-12-01T15:06:10Z")
Thank you Chris! That solved it. ---
**Author:** ![cstawarz](https://yyz1.discourse-cdn.com/flex031/user_avatar/mworks.discourse.group/cstawarz/32/3_2.png) [@cstawarz](https://mworks.discourse.group/u/cstawarz)\ **Post date:** [July 19, 2022, 10:00pm UTC](https://mworks.discourse.group/t/creating-lists-from-a-stimulus-group/429/7 "2022-07-19T22:00:32Z")