ORA-29250: Invalid index specifed in call

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ORA-29250: Invalid index specifed in call to dbms_sql.bind_array
Cause: An invalid index wasspecified in a call to bind_array of dbms_sql. The
index may have been null or of an improper value.
Action: Correct the indexvalue by modifying your PL/SQL program and try the
bind_array call again.
ORA-29251: Index1 isgreater than Index2 in call to dbms_sql.bind_array
Cause: The value of index1was greater than the value for index2 in the call to
bind_array. This is illegal since the elements of the table that will be boundare
those with indexes greater than or equal to index1 and less than or equal to
index2