Enterprise Vault API Runtime missing

If an Enterprise Vault API Runtime is missing, users see the following message:

Could not load file or assembly 'KVS.EnterpriseVault.Interop.EVContentManagementAPI, Version=version, Culture=neutral, PublicKeyToken=26c5e2ccf2b9267c' or one of its dependencies. The system cannot find the file specified.

If users see this message, check that the correct version of the API Runtime is installed. The API Runtime version and the Enterprise Vault server version must be the same. For example, if you install Mobile Search with Enterprise Vault API Runtime 8.0 SP2, the Enterprise Vault server must be version 8.0 SP2.