SNACONS operates with all releases of OS/390. It is also known to work on MVS/ESA 5.2.2, z/OS 1.4 and z/OS 1.7.
While you are still migrating your systems to z/OS, SNACONS gives you the equivalent facility on your existing OS/390 systems. Even after you have converted to z/OS, you may still want to continue using SNACONS because it does not require you to predefine consoles (you can log on from any VTAM terminal). SNACONS consoles can also be useful in a sysplex environment because they do not count towards the 99 console limit. Furthermore, you can have SNACONS up and running without an IPL.
SNACONS requires RACF or an equivalent security product to provide signon support. SNACONS has been tested with RACF Version 2, and I have received reports that SNACONS works with CA-Top Secret 5.0. It probably also works with ACF2, although this has not been tested.
SNACONS will work with any screen which can appear to VTAM as a 3270 with 24 rows and 80 columns. This includes:
So far as I am aware, the only thing that which won't work is the old 3277 model 1 (if any still exist!) because this is a 12x40 screen.
Yes, but only in 24x80 mode with the current version of SNACONS.
No. SNACONS cannot operate until VTAM is active. You can get away without a master console by using the Hardware Management Console (HMC), if your system has one. Otherwise you will still need at least one real MCS console to IPL.
Use the command
Use the command
Use a command such as
Maybe the messages are being suppressed by the MVS message processing
facility. Use the command
D MPF and check whether the
message identifier appears in the list.
Maybe the console route codes or message importance levels do not
match those of the message. Use the command
to display the route codes and importance levels assigned to the
This can be done via the RACF profile MVS.MCSOPER.* in the OPERCMDS class. This example shows how to prevent all but named users from activating a console session:
SETROPTS CLASSACT(OPERCMDS) SETROPTS GENERIC(OPERCMDS) RDEFINE OPERCMDS MVS.MCSOPER.* UACC(NONE) PERMIT MVS.MCSOPER.* CL(OPERCMDS) ID(user1 user2) ACC(READ) SETROPTS RACLIST(OPERCMDS) REFRESH
Define RACF profiles in the OPERCMDS class. Here is an example showing how to allow display commands to be issued by all users, but restrict all other MVS commands to a specified group:
For more information, refer to the OS/390 MVS Planning: Operations manual.
SETROPTS CLASSACT(OPERCMDS) SETROPTS GENERIC(OPERCMDS) RDEFINE OPERCMDS MVS.* UACC(NONE) PERMIT MVS.* CL(OPERCMDS) ID(groupid) ACC(READ) RDEFINE OPERCMDS MVS.DISPLAY.* UACC(READ) SETROPTS RACLIST(OPERCMDS) REFRESH
Use the TSO ALTUSER command to add an OPERPARM segment for each user. Here are some examples:
ALU (userid) OPERPARM(AUTH(ALL) ROUTCODE(ALL)) ALU (userid) OPERPARM(AUTH(IO,SYS) ROUTCODE(3:6)) ALU (userid) OPERPARM(AUTH(INFO) ROUTCODE(NONE))
The current version of SNACONS has no facility to enter a new password. You have to logon to TSO (or Netview or CICS) and change your password in the logon panel. Then you can sign on to SNACONS using the new password.
The current version of SNACONS only supports DEL=RD mode with in-line display areas. Support for other modes (for example DEL=N and out-of-line display areas) may be added in a future release.
SNA001I SNACONS CANNOT OPEN ACB applid, R15=00000008, ACBERFLG=5A
This means that you have not activated the VTAM application major
node for SNACONS. Use the command
IEA995I SYSTEM COMPLETION CODE=683
SNA015I SNACONS SUBTASK ABEND CODE=8468300
This means that you have not APF-authorized the SNACONS load library.
This is an OS/390 bug. Ask your IBM representative to supply you with a PTF to fix APAR OW33359.
Press PF1. It is hardcoded to issue a
K E,1 command.
Yes. Just like a real MCS console, PA1 is the command recall key. The current version of SNACONS can only recall the last command entered. A multiple command recall stack may be introduced in a future version.
logoff command at your SNACONS console.
Use the command
Last updated 20 Mar 2006