*M1 Pro, Ventura 13.4.1 *Psychopy v2024.2.1 There was an accidental end of Psychopy Runner. After this, ‘.psyexp’ file with which I’m working does not open with the error message below. Other files open well. What’s the problem… Traceback (most recent call last): File “/Applications/PsychoPy.…

Here’s a possible solution: [image] PsychoPy experiment doesn't load Builder We think this was caused by renaming a Routine; this was a new feature and apparently not working correctly as of 1.84.1. The bug that led to this issue is now fixed and will be included in next …

@wakecarter Thank you very much for prompt response. However in my case, there were no error messages about ‘Routine name’. So I don’t know exactly which routine name triggers the problem or which routine name I had changed. +) Even if I compared my present file with previous file which was at gi…

If you have synced to Gitlab, then download a previous version and revert to that. You can also look at the differences made to the psyexp file by each commit.

Hi, I have a very similar issue but cannot solve it, then I found this thread. My error message reads: Traceback (most recent call last): File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.10/psychopy/app/builder/builder.py”, line 800, in fileOpen File “/Applications/PsychoPy.app/Con…

Please could you share your psyexp on this thread? [image] Experiment won't open- Unhandled internal error Builder Hi, I encountered this error seemingly out of nowhere and can’t figure out what the issue is. I’m super new to Psychopy and programming in genera…

Cannot open specific builder file after an accidental end

Builder

wakecarter August 19, 2026, 9:40am 6

Please could you share your psyexp on this thread?

Topic		Replies	Views
Error when trying to open .psyexp file Builder	2	1984	September 29, 2016
Experiment won't open- Unhandled internal error Builder	2	54	August 19, 2026
After working on builder for a while, builder file can't be worked on or be opened! Builder	4	85	March 25, 2026
Can't open experiment from builder after syncing with Pavlovia Builder	1	462	July 24, 2020
Unable to load and run saved experiment Builder	5	2630	September 30, 2016

Cannot open specific builder file after an accidental end

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