Experiment runs offline, not online; reference error, but variable is already defined in begin experiment

Online experiments
1

URL of experiment: Sign in · GitLab

Description of the problem:
The experiment stops quickly, saying: ReferenceError: msg is not defined

Tried to solve this by:

  • checking the cribsheet: msg is already defined at begin experiment. Its a n-back task, with several sub n-back task, in each feedback part, msg is defined at begin experiment and then used (in the picture under feedback 2, not used in other code under trial and feedback)

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image1102×733 27.5 KB

  • tried to check what happens in the browser/developer console, but I do not really understand:

ReferenceError: msg is not defined
at Scheduler._currentTask (/sbruijniks/remind_nback/nback_fulltask22.10b%20-%2029.10online.js:1614:20)
at Scheduler._runNextTasks (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:33108)
at async Scheduler._runNextTasks (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:33150)
at async Scheduler._runNextTasks (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:33150)
at async update (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:32204)
window.onunhandledrejection @ /sbruijniks/remind_n…js-2022.2.4.js:1302Understand this errorAI
FATAL 12:38:00.599 _GUI.dialog psychojs-2022.2.4.js:1257 | {}
BrowserConsoleAppender.append @ /sbruijniks/remind_n…chojs-2022.2.4.js:7Understand this errorAI
/sbruijniks/remind_n…29.10online.js:1614 Uncaught (in promise) ReferenceError: msg is not defined
at Scheduler._currentTask (/sbruijniks/remind_nback/nback_fulltask22.10b%20-%2029.10online.js:1614:20)
at Scheduler._runNextTasks (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:33108)
at async Scheduler._runNextTasks (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:33150)
at async Scheduler._runNextTasks (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:33150)
at async update (/sbruijniks/remind_nback/lib/psychojs-2022.2.4.js:1049:32204)Understand this errorAI
remind_nback/:1 Uncaught (in promise) Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received

What to do? Offline the task works.

2

Your screenshot is of a Python code component. You should change it to Auto if you want it to do anything online.

3

Thanks for your help!
Stupid mistake, I now did change all code types to ‘‘Auto → JS’’, but still the same error happens…
When I run it on PsychoJS on a local server it works but on Pavlovia it doesn’t (‘‘reference error msg not defined’’)

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4

Does it behave the same in an incognito tab?

5

no, the task works…
what is happening?

6

When you synchronise changes to your experiment, you may need to clear your browser cache to see those changes online (using Ctrl-F5, Ctrl-Shift-R or equivalent). If this does not work use an incognito browser tab. A participant will not need to do this, so long as they have not already tried a previous version of your experiment.

https://psychopy.org/online/psychoJSCodingDebugging.html

1 Like
7

super this was the mistake, many thanks!