SS - Starting a session with a System DCB

Note: This service is currently treated as identical to SB and is retained for compatibility. See SB - Starting a session with a BLDL identifier for more information and restrictions.
Table 1. SS parameter list
Parameter Usage Format Content
1 in structure 'SS', X'0001'
2 in/out binary word mtoken
3 in structure DCB
4 in structure Directory entry or DD name. Only the first 8 bytes are used.