We upgrade tridion recently from 2013 sp1 to web 8.1 .While triggering test mailing we are getting following error

Could not load file or assembly 'Tridion.OutboundEmail.Templating, Version=, Culture=neutral, PublicKeyToken=ddfc895746e5ee6b' or one of its dependencies. The system cannot find the file specified.
  • Looking at the error, it feels like Templating dll is from 2013 sp1 so might you are missing some upgrade steps.
    – Hiren Kaku
    Jul 23, 2016 at 20:59

2 Answers 2


Part of the upgrade involves starting Template Builder and selecting Create Default Building Blocks from the Tools menu and then selecting the parent folder of your existing Default Templates folder.

That will update all of the default templates to the latest version, including Audience Manager / Outbound E-mail, Experience Optimization, etc.


Uploading new Tridion.OutboundEmail.Templating.Templates.dll which is located inside %TRIDION%/bin into Outbound E-mail default Tridion.OutboundEmail.Templating.Templates TBB resolve the problem.

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