"(MXCHGDCL18) You cannot change %j to a dimension composite because one or more surrogates has been defined for it."
*Cause: 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.
*Action: Either delete all surrogates for the dimension, or do not attempt
to redefine the dimension as a composite.