PI14214: MERVA INADVERTENTLY TERMINATED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• At the operating system console, message "DSL001A Enter a MERVA
  command" is issued. An operator inadvertently replied "C". This
  is the abbreviation of the CANCEL command and resulted in MERVA
  closing down and a significant business outage.
  

Local fix

• No local fix available.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All MERVA users.                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: An operator at the system console may   *
  *                      inadvertently enter the MERVA CANCEL    *
  *                      command, which causes MERVA to          *
  *                      terminate immediately.                  *
  ****************************************************************
  * RECOMMENDATION: MERVA can now be customized in DSLPRM        *
  *                 to terminate only with confirmation.         *
  ****************************************************************
  When prompted to enter a MERVA command, an operator at the
  system console inadvertently replied "C", the abbreviation
  of the CANCEL command. MERVA immediately terminated.
  

Problem conclusion

• A new DSLPARM parameter is introduced to determine how to
  terminate MERVA.
  
  EXCONF = NO | YES
  
  If EXCONF=NO is specified,
   MERVA terminates immediately when command TERMINAT
   (abbreviated T) or CANCEL (abbreviated C) has been
   entered or issued. This is the default.
  
  If EXCONF=YES is specified,
   a confirmation is requested to terminate MERVA.
   When command TERMINAT (T) or CANCEL (C) has been
   entered or issued, MERVA is set to Terminate Pending
   or Cancel Pending status.
   The pending termination can either be confirmed or revoked.
   If confirmed, MERVA terminates.
   If revoked, MERVA does not terminate.
  
  Two new commands are introduced to confirm or revoke a pending
  termination.
  - Command CONFIRM confirms the pending termination. MERVA
   terminates. The command can be abbreviated up to at least CONF.
  - Command NOCONF revokes the pending termination. MERVA
   does not terminate. The command can be abbreviated up to at
   least NOCO.
  
  Termination can be pending only if command TERMINAT (T) or
  CANCEL (C) has been entered or issued without parameter DUMP or
  ABDUMP in the following environments:
  - At the system console.
  - In the command function CMD or MSC.
  - From a nucleus program or batch program.
  
  An operator at the system console can resolve a pending
  termination that originates from the command function or a
  program. The operator first enters command T or C. Then
  the operator enters either command CONFIRM (MERVA terminates)
  or NOCONF (MERVA does not terminate). This is exclusive for
  the system console and does not apply to the command function
  or a program. In those environments, only the user who set MERVA
  to Terminate Pending or Cancel Pending status can confirm or
  revoke the pending termination.
  
  After it has issued a TERMINAT (T) or CANCEL (C) command,
  a nucleus or batch program should be prepared to confirm or
  revoke the pending termination by issuing either the CONFIRM or
  NOCONF command.
  
  When an API program issues TERMINAT (T) or CANCEL (C) without
  parameter DUMP or ABDUMP, MERVA always terminates immediately
  even if EXCONF=YES is specified.
  
  Four new operator messages are available: DSL230I to DSL233I.
  Use the SHOW command to see the message description.
  For example, SHOW DSL230I.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UI16628

Modules/Macros

• DSLAPIFL DSLCSD41 DSLHCMD  DSLHICMD DSLMU036
  DSLNCMD  DSLNCMTC DSLOMSC  DSLPARM  DSLPARMS DSL230I  DSL231I
  DSL232I  DSL233I  H0B0410J
  

Fix information

• Fixed component name

  MERVA ESA 4.1.0

• Fixed component ID

  5648B2900

Applicable component levels

• R410 PSY UI16628

     UP14/04/08 P F404

Fix is available

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