Error message 'The translation memory '[filename].txt' could not be loaded: 'Method not found: 'Void Sdl.LanguagePlatform.Core.Wordlist.Load(System.String)'.' while trying to upgrade legacy Translation Memory

Trying to upgrade a TXT export (usually generated from WinAlign or Translations Workbench) in the SDL Trados Studio is displaying the following warning message:

The translation memory '[filename].txt' could not be loaded: 
'Method not found: 'Void Sdl.LanguagePlatform.Core.Wordlist.Load(System.String)'.'
 

Solution: Install/upgrade to SDL Trados Studio 2017

1. Login into the SDL Account here: https://oos.sdl.com 
2. Go to Products & Plans > Downloads
3. Locate the SDL Trados Studio 2017 (or higher) list item and download the installer on your local harddrive.
4. After the installer is downloaded, install and use SDL Trados Studio 2017 (or higher)

After the installation you can use the Upgrade Translation Memory again for bilingual legacy TXT files.

This messages appear due to the missing 3rd party component Microsoft Visual C++ 2005 that is required to process the SDL Trados 2007 files/features/components that are installed/shipped with SDL Trados Studio 2011 (and later) and provide a certain backwards compatibility. E.g. processing bilingual *.ttx (TagEditor) documents in SDL Trados Studio or as described in this article, the upgrade process for legacy Translation Memories.