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Sharepoint Designer is crashing when trying to add new External Content Type with below error message:

  Stopped working

Problem signature:
  Problem Event Name:   CLR20r3
  Problem Signature 01: spdesign.exe
  Problem Signature 02: 14.0.4750.1000
  Problem Signature 03: 4b8baffb
  Problem Signature 04: mscorlib
  Problem Signature 05:
  Problem Signature 06: 4ca2b851
  Problem Signature 07: 4212
  Problem Signature 08: a9
  Problem Signature 09: System.TypeInitialization
  OS Version:   6.1.7601.
  Locale ID:    1033
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up vote 0 down vote accepted

I have never experience it, but probably these two things helps you:

  1. Close SPD and clear its cache. It is located here:

    %APPDATA%\Microsoft\Web Server Extensions\Cache %USERPROFILE%\AppData\Local\Microsoft\WebsiteCache

  2. If it doesn't help, try to uninstall SPD and install the latest version of it.

Clear the cache by pasting the following in cmd:

    cd "%APPDATA%\Microsoft\Web Server Extensions\Cache"
    del *.web /S /Q "%APPDATA%\Microsoft\Web Server Extensions\Cache"
    cd "%USERPROFILE%\AppData\Local\Microsoft\WebsiteCache\"
    rmdir /S /Q "%USERPROFILE%\AppData\Local\Microsoft\WebsiteCache\."
    mkdir "%USERPROFILE%\AppData\Local\Microsoft\WebsiteCache"
    dir "%APPDATA%\Microsoft\Web Server Extensions\Cache"
    dir "%USERPROFILE%\AppData\Local\Microsoft\WebsiteCache"
share|improve this answer
It worked after reinstallation. – ARD May 13 '13 at 10:04

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