Oracle Message ORA-26690 - datatype not supported at non-Oracle system

ERRORdatatype not supported at non-Oracle system
CAUSEOne of the columns of the LCR being applied was of a datatype not supported by either the target non-Oracle system or by the Oracle transparent gateway through which the apply is being done.
ACTIONDo not apply data of this type. If possible, filter out columns containing such datatypes before applying.