Oracle Message PLS-00403 - expression string cannot be used as an INTO-target of a SELECT/FETCH statement

ERRORexpression string cannot be used as an INTO-target of a SELECT/FETCH statement
CAUSEA FETCH statement was unable to assign a value to an assignment target in its INTO list because the target is not a legally formed and declared variable. For example, the following assignment is illegal because Jones is a character string, not a variable: FETCH my_cur INTO Jones;
ACTIONCheck the spelling and declaration of the assignment target. Make sure that the rules for forming variable names are followed.