Schema location could not be resolved for URI: XXX

This error indicates that a document points to a schema or schema version that is unknown to FontoXML.

To fix this error, do either of the following:

• Make sure the document points (and adheres) to the schema location used by FontoXML. You can do this by recompiling the schema using the fdt editor schema compile command.

• Configure FontoXML to use the expected schema location with the schema definition that it used.