Explanation: *NODUPPROC and *NODUPVAR are defaults on the OPTION parameter and *WARN must be specified with them. This ensures that if duplicate procedures or variables are found, but are not allowed, warning messages are issued to identify the duplicate procedures or variables. If you do not want to receive warnings (*NOWARN), you must also specify that both duplicate procedures and duplicate variables are allowed (*DUPPROC and *DUPVAR).
Response: Select *WARN with *NODUPVAR or *NODUPPROC. If you specify *NOWARN to avoid receiving warnings, you must allow both duplicate procedures and duplicate variables (*DUPPROC and *DUPVAR). *NODUPVAR and *NODUPPROC are defaults for the OPTION parameter.
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