Cause
This error occurs if a schema file has specified that the schema being loaded should be created as a subschema of another schema but this superschema does not exist. This can result from an incorrect schema name in the schema file, or it can be because the superschema does not yet exist in the current JADE database.
Action
Correct the schema name in the schema file, if it is incorrect. If the name is correct but the superschema does not yet exist, create it in JADE or load it from another schema file.