Running the CLI generates an error similar to the following:

[error] Schema Definition Warning: DFDL Schema Validation warned due to the following: DFDL Schema Validation Warning due to org.xml.sax.SAXParseException; systemId: file:/C:/Users/npatrick/Documents/Projects/test-daffodil/global_element.dfdl.xsd; lineNumber: 18; columnNumber: 47; schema_reference.4: Failed to read schema document './complex_types.dfdl.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>. File: C:\Users\npatrick\Documents\Projects\test-daffodil\global_element.dfdl.xsd
Schema context: SchemaSet. Location in global_element.dfdl.xsd.

There does not seem to be any legitimate error because the test data is parsed correctly. I was able to reproduce this error in spin 12, but not spin 11.