Message Oracle ORA-35568 - (SQLIMP03) The datatype of variable number should be INTEGER, LONGINTEGER or SHORTINTEGER.

ERROR	(SQLIMP03) The datatype of variable number should be INTEGER, LONGINTEGER or SHORTINTEGER.
CAUSE	The target variable was not INTEGER, LONGINTEGER or SHORTINTEGER.
ACTION	The target variable must be INTEGER, LONGINTEGER or SHORTINTEGER.