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OS : Win 10 Pro
PsychoPy version : 2026.1.3
Standard Standalone Installation: Yes
URL of experiment: nback_experiment [PsychoPy]
I’m getting an “unknown resource” error when piloting my experiment (need to buy credits for running it), for a conditions file used in a practice loop:
Unfortunately we encountered the following error:
- when importing condition: conditions_practice.xlsx
- when getting the value of resource: conditions_practice.xlsx
- unknown resource
I’ve ruled out the usual suspects:
- The file exists in
html/resources/locally and on the Pavlovia GitLab repo (confirmed via the file browser) - It’s correctly named with no spaces/special characters (originally named
conditions_practice (1).xlsx, renamed toconditions_practice.xlsx— confirmed updated in the loop’s Conditions field, in Experiment Settings → Online → Additional Resources, in the compilednback_experiment.js, and in the resources folder itself) - I’ve Synced multiple times after each change
- Tested in an incognito window to rule out browser caching (confirmed not caching — error message itself updated to reflect the new filename after rename)
When I checked the browser’s Network tab while piloting, no request for the .xlsx file is ever attempted at all — no 404, no failed fetch, nothing. The error appears to happen before PsychoJS tries to download the resource.
I also checked config.json directly (via the Network tab → Preview), and it contains no resources array at all — just experiment, pavlovia, and gitlab metadata:
json
{
"experiment": { "name": "nback_experiment", "fullpath": "elang/nback_experiment" },
"pavlovia": { "URL": "https://pavlovia.org/" },
"gitlab": { "projectId": 530338 }
}
I also tried clearing the Output path field in Experiment Settings → Online (per a fix suggested for a similar issue in another thread), re-synced, and got the same error.
