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Unable to build custom action named '<name>' from object '<assembly>' because the assembly is marked as excluded 

The specified custom action cannot be built because the assembly containing the custom action has been excluded from the deployment project.

To correct this error

  1. In Solution Explorer, select the project that contains the assembly referenced in the error message.

  2. Select the excluded file.

  3. In the Properties window, select the Exclude property and set it to false.

See Also