Article ID: 119374, created on Dec 27, 2013, last review on Apr 30, 2014

  • Applies to:
  • Plesk 11.5 for Windows


MSSQL Webadmin shows error:

    Compiler Error Message: BC30451: Name 'AppInterface' is not declared.


Site sqladmin(default) is misconfigured in IIS. Subfolder mssql of this domain should be application.


  1. Open IIS Manager and find site sqladmin(default)
  2. Expand sqladmin(default) and find mssql folder, please make sure that is application.
  3. If mssql folder is not application, please right click on this folder and set "Convert to Application"

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