The error received is .... 

ORA-06550: line 3, column 8: 
PLS-00306: wrong number or types of arguments in call to 'PROC_BY_SERIAL_NO' 
ORA-06550: line 3, column 8: 
PL/SQL: Statement ignored (DBD: oexec error) at testpl1.pl line 43. 
Database handle destroyed without explicit disconnect. 
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