I migrate a site collection from version 2010 to the 2013.
I have a list with a custom content type. (document set).
When I try to open a document with the url


I get the error

File Not Found

I checked the log and the error is on this file


The file ToolBar.ascx exists in the hive /15/ControlTemplates/

I tried to remove the import of that page from the docsethomepage.aspx page of the content type (_cts/myContentType/docsethomepage.aspx) but it is still not working.


I tread to delete the page _cts/myContentType/docsethomepage.aspx but I still get the same error, so I guess I am editing the wrong page.

  • Can you see the document inside the library? May 5, 2015 at 12:43
  • yes, I can open the document library and I can see the property of the item (with the custom content type). But when I try to open an item (click on the document set) I get the error
    – Nk SP
    May 5, 2015 at 12:44
  • You can open up SPD and check if the Page got migrated or not. May 5, 2015 at 12:52
  • The page is there, but my, but if I change the page _cts/myContentType/docsethomepage.aspx I do not see changes
    – Nk SP
    May 5, 2015 at 12:53

1 Answer 1


I've come across this issue in the past. In the end I had to carry out these steps:

  1. Delete the docsethomepage.aspx file.
  2. Copy in a fresh docsethomepage.aspx file.
  3. Check out the docsethomepage.aspx file, then check it back in.
  4. Go into the document set's settings and check Update the Welcome Page of Document Sets inheriting from this content type

This was where I found my answer.

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