# Issue syncing with Pavlovia

**URL:** <https://discourse.psychopy.org/t/issue-syncing-with-pavlovia/32071>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [November 21, 2022, 1:56am UTC](https://discourse.psychopy.org/t/issue-syncing-with-pavlovia/32071 "2022-11-21T01:56:45Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ToriV](https://avatars.discourse-cdn.com/v4/letter/t/839c29/32.png) [@ToriV](https://discourse.psychopy.org/u/ToriV)\
**Post date:** [November 21, 2022, 1:56am UTC](https://discourse.psychopy.org/t/issue-syncing-with-pavlovia/32071/1 "2022-11-21T01:56:45Z")

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I can’t seem to sync my PsychoPy experiment to Pavlovia due to an error code:  
Can someone please explain this issue to me so I can fix it?

Traceback (most recent call last):  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\builder\builder.py”, line 1369, in onPavloviaSync  
self.fileExport(htmlPath=htmlPath)  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\builder\builder.py”, line 808, in fileExport  
self.app.showCoder()  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\_psychopyApp.py”, line 729, in showCoder  
self.coder.setOutputWindow(True)  
File “C:\Program Files\PsychoPy\lib\site-packages\psychopy\app\coder\coder.py”, line 2734, in setOutputWindow  
self.paneManager.Update()  
File “C:\Program Files\PsychoPy\lib\site-packages\wx\lib\agw\aui\framemanager.py”, line 6388, in Update  
self.DoUpdate()  
File “C:\Program Files\PsychoPy\lib\site-packages\wx\lib\agw\aui\framemanager.py”, line 6582, in DoUpdate  
self.Repaint()  
File “C:\Program Files\PsychoPy\lib\site-packages\wx\lib\agw\aui\framemanager.py”, line 8773, in Repaint  
client\_dc = wx.BufferedDC(wx.ClientDC(self.\_frame), wx.Size(w, h))  
wx.\_core.wxAssertionError: C++ assertion “m\_buffer && m\_buffer-\>IsOk()” failed at …..\src\common\dcbufcmn.cpp(134) in wxBufferedDC::UnMask(): invalid backing store

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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:** [November 21, 2022, 2:14pm UTC](https://discourse.psychopy.org/t/issue-syncing-with-pavlovia/32071/3 "2022-11-21T14:14:36Z")

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Try closing the coder window and retry.

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**Author:** ![ToriV](https://avatars.discourse-cdn.com/v4/letter/t/839c29/32.png) [@ToriV](https://discourse.psychopy.org/u/ToriV)\
**Post date:** [November 21, 2022, 2:29pm UTC](https://discourse.psychopy.org/t/issue-syncing-with-pavlovia/32071/4 "2022-11-21T14:29:54Z")

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I have attempted retrying multiple times. I have deleted the experiment and attempted to resync it to pavlovia and I still get the same error. I have even remade the excel files that my data is on and attempted to use them instead but no luck.

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**Author:** ![Becca](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/becca/32/34260_2.png) [@Becca](https://discourse.psychopy.org/u/Becca)\
**Post date:** [November 22, 2022, 1:28am UTC](https://discourse.psychopy.org/t/issue-syncing-with-pavlovia/32071/5 "2022-11-22T01:28:23Z")

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Please may you confirm that when you try to sync only the psychopy builder window is open? (i.e. no coder view open - as Wake suggested).

Becca