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This article describes the MSB3217 error code.
Message text
MSB3217: Cannot register assembly 'assembly-name'.
Description
This error occurs in the RegisterAssembly task when, for any reason, the assembly could not be registered as a COM object. The error is followed by information from Windows with more details about the issue. See Registering assemblies with COM.
Resolution
This error occurs for a wide variety of causes that result in a failure to register an assembly. Registering a COM object requires that the account that runs MSBuild has admin permissions on the machine.
Applies to
All versions of MSBuild