EF - Not able to call the stored procedure

Question

ORA-06550: line 1, column 8:
PLS-00306: wrong number or types of arguments in call to 'SP_NAME'
ORA-06550: line 1, column 8:
PL/SQL: Statement ignored

Not able to call the stored procedure which returns the OUT SYS_REFCURSOR using the EF-6

NOTE: I'm able to call a stored procedure which returns an INT.