BE0020: Unknown field tag: '[tagName]'

Error BE0020: Unknown field tag: '[tagName]'

This error occurs when an unrecognized replacement tag field name is encountered while transforming a template file or a block of template text.

The most likely cause is a misspelled replacement tag name or one that is not recognized. Refer to the error message for information about the cause. If you are unable to resolve the issue, open an issue in the Sandcastle Help File Builder project on GitHub containing the details from the error message and attach a small example project with any related files that can be used to duplicate the problem.

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