Oracle Error Message
ORA-34210: (MXCHGDCL18) You cannot change workspace object to a dimension composite because one or more surrogates has been defined for it.
Reason for the Error
The user attempted to redefine a conjoint dimension as a composite, but the conjoint has one or more surrogates defined. A dimension that has surrogates cannot be redefined as a composite.
Solution
Either delete all surrogates for the dimension, or do not attempt to redefine the dimension as a composite.