Message Oracle ORA-36871 - (XSFTDSC01) Object string cannot be used to define a column in a LIMITMAP.

ERROR(XSFTDSC01) Object string cannot be used to define a column in a LIMITMAP.
CAUSEThe object cannot define a column in LIMITMAP most likely because it is of a wrong type such as, for example, a Worksheet.
ACTIONRemove the reference from the LIMITMAP.