KEYLEN specification - Key = '0040'

DALKYLEN specifies the length, in bytes, of the keys used in the data set. It is mutually exclusive with the CODE (DALCODE), MODE (DALMODE), PRTSP (DALPRTSP), STACK (DALSTACK), and TRTCH (DALTRTCH) keys. When you code this key, # and LEN must be one, and PARM contains the key length.

Example: To specify a key length of eight, code:

KEY    #      LEN    PARM
0040   0001   0001   08