# Psychopy 1.1 Windows 11 crash problem

**URL:** <https://discourse.psychopy.org/t/psychopy-1-1-windows-11-crash-problem/46560>\
**Category:** Builder\
**Created:** [February 9, 2026, 3:36pm UTC](https://discourse.psychopy.org/t/psychopy-1-1-windows-11-crash-problem/46560 "2026-02-09T15:36:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![M\_Safa\_Sukut](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/m_safa_sukut/32/46152_2.png) [@M\_Safa\_Sukut](https://discourse.psychopy.org/u/M_Safa_Sukut)\
**Post date:** [February 9, 2026, 3:36pm UTC](https://discourse.psychopy.org/t/psychopy-1-1-windows-11-crash-problem/46560/1 "2026-02-09T15:36:45Z")

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If this template helps then use it. If not then just delete and start from scratch.

**OS** (e.g. Win10): win11  
**PsychoPy version** (e.g. 2024.2.4 Py 3.8): 1.1  
**Standard Standalone Installation? (y/n)** If not then what?: y  
**Do you want it to also run online? (y/n) n**  
**What are you trying to achieve?:**

**What did you try to make it work?:**

**Link to the most relevant existing thread you have found:**

**What specifically went wrong when you tried that?:**  
Include pasted full error message if possible. “That didn’t work” is not enough information.

Traceback (most recent call last):  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\_psychopyApp.py”, line 869, in showBuilder  
self.newBuilderFrame()  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\_psychopyApp.py”, line 850, in newBuilderFrame  
self.builder = BuilderFrame(None, -1,  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\builder\builder.py”, line 245, in **init**  
self.\_mgr.LoadPerspective(self.frameData[‘auiPerspective’])  
File “C:\Program Files\PsychoPy\lib\site-packages\wx\lib\agw\aui\framemanager.py”, line 5291, in LoadPerspective  
pane = self.LoadPaneInfo(pane\_part, pane)  
File “C:\Program Files\PsychoPy\lib\site-packages\wx\lib\agw\aui\framemanager.py”, line 5164, in LoadPaneInfo  
raise Exception(“Bad perspective string”)  
Exception: Bad perspective string

this is the error code

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [February 9, 2026, 5:49pm UTC](https://discourse.psychopy.org/t/psychopy-1-1-windows-11-crash-problem/46560/2 "2026-02-09T17:49:54Z")

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What year is your version from?

Is an upgrade possible?

> [@The problem of running multiple versions of PsychoPy](https://discourse.psychopy.org/t/the-problem-of-running-multiple-versions-of-psychopy/45631):
>
> I have installed two versions of PsychoPy (2025 and 2021). However, for the 2021.2.3 version of PsychoPy, only the runner can be opened. When I try to open the builder and coder, they flash once and then there is no response, and the interface doesn’t come out. But the 2025 version can be used normally. The problem is that I have other uses for the 2021.2.3 version, so I must open it. I don’t know where the problem lies. Can anyone help me? Thank you very much! p.s. the error:Traceback (most r…