.-DECK=NO--.   
>>-+----------+------------------------------------------------><
   '-DECK=YES-'   

YES

instructs the assembler to place the generated object module in the file defined by the SYSPUNCH DD statement (z/OS), the FILEDEF SYSPUNCH command (CMS), or the ASSGN SYSPCH statement (z/VSE).

NO

instructs the assembler not to place the generated object module in the file defined by the SYSPUNCH DD statement (z/OS), the FILEDEF SYSPUNCH command (CMS), or the ASSGN SYSPCH statement (z/VSE).

Default

DECK=NO

Important:

Under z/VSE, the DECK assembler option can only be set using the // OPTION DECK job control statement. The value specified for the DECK option during installation is ignored by the assembler.