Cause
This error occurs if your schema file attempts to redefine the default class map file.
The default map file specifies the name of the database file that is used to contain instances of a class for which no map file has been defined. This error will result if the default map file in the schema file is different from the existing default map file.
Action
Change the class map file specified in the defaultFileDefinition section of your schema file so that it matches the existing definition.
Refer to your JADE messages (jommsg.log) log file for more details about this error.