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Mauro Pappalardo's avatar
Mauro Pappalardo
Copper Contributor
Jul 25, 2018
Solved

Could not load file or assembly 'Microsoft.Office.Excel.WebUI after migration to SHarePoint 2016

After migratin to SharePoint 2016 from SharePoint 2013 and accessing to a site i have this error:
 
Sorry, something went wrong
Could not load file or assembly 'Microsoft.Office.Excel.WebUI, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified.
 
anyone can help me?
Thanks 
 
 
 
2016
  • paulpascha's avatar
    paulpascha
    Jul 25, 2018

    I guess you are making use of Excel Services in your site, probably a WebPart on the site's home page.

     

    Excel Services was deprecated in SharePoint 2016 and moved to a separate product called Office Online Server. 

     

    For more details see the article below and look for the section called "Excel Services in SharePoint":

    https://docs.microsoft.com/en-us/sharepoint/what-s-new/what-s-deprecated-or-removed-from-sharepoint-server-2016

     

2 Replies

  • paulpascha's avatar
    paulpascha
    Bronze Contributor
    Jul 25, 2018

    I guess you are making use of Excel Services in your site, probably a WebPart on the site's home page.

     

    Excel Services was deprecated in SharePoint 2016 and moved to a separate product called Office Online Server. 

     

    For more details see the article below and look for the section called "Excel Services in SharePoint":

    https://docs.microsoft.com/en-us/sharepoint/what-s-new/what-s-deprecated-or-removed-from-sharepoint-server-2016

     

    • Mauro Pappalardo's avatar
      Mauro Pappalardo
      Copper Contributor
      Jul 25, 2018
      Thank you Paul ,
      Yes it was an excel web part and I solved it through the web part maintenance page.
      I noticed that you can do the same thing by editing the default via SharePoint designer

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