-644 FFFFFD7C SCHEMA IS IN USE
Source
eDirectory
Explanation
An attempt was made to remove a schema class definition that is used in the expanded class definition of an object or that is specified in the containment list of another schema class definition.
Or, an attempt was made to remove a schema attribute definition specified in a naming, mandatory, or optional attribute list of a schema class definition.
Possible Cause
If this error occurs during schema synchronization, significant discrepancies can exist between the schema in the eDirectory databases on the servers.
Action
Handle this as a schema synchronization error.
To remove a schema class or attribute definition, the dependencies mentioned in the Explanation must be removed before attempting to remove the schema definition. However, operational schema class and attribute definitions cannot be removed. See error -643.
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