OW22660: OPEN ACB ACBERROR ERRFLG X'5A' USING MODEL APPL

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• OPEN ACB fails with ACBERFLG ACB ERROR of X'5A' that means the
  APPL is not active.  In this case a dynamic model APPL
  definition was being used with MODETAB="tablename".  A display
  of the table (D NET,TABLE,ID="tablename") displays IST986I with
  an incorrect, may be negative, USE COUNT.  A vtam internal trace
  shows that the MODETAB is not RCE added during OPEN ACB, but it
  is RCE deleted during CLOSE ACB.  This results in an incorrect
  use count, and the table may be freed prematurely.
  Additional information:
  The problem described by this apar is the result of incorrect
  updating of a table use count, when dynamic appl definitions
  are used.  These same tables can be referred to by other
  definitions, such as LUs, CDRSCs, predefined APPLs, etc.  VTAM
  also increments and decrements the table use count for these
  resources; however it is only the model or dynamic APPL that
  causes the count to be incorrect.  In other words the D NET
  TABLE will show the combined result of the correct and the
  incorrect manipulation of the table use count.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All using model application program          *
  *                 definitions to build dynamic APPLs.          *
  ****************************************************************
  * PROBLEM DESCRIPTION: ACBERROR = X'5A' trying to OPEN ACB     *
  *                      for a dynamic application program.      *
  *                                                              *
  *                      Also, the use count for the following   *
  *                      tables are not being incremented when   *
  *                      application programs are activated:     *
  *                        Associated LU table                   *
  *                        Interpret table                       *
  *                        Model name table                      *
  *                        Logmode table                         *
  *                        USS table.                            *
  *                      The use count for these tables can be   *
  *                      displayed with the DISPLAY TABLE        *
  *                      command.                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When a dynamic APPL RDTE is being built, module ISTSDCLO adds
  the associated LU table, interpret table, model name table,
  logmode table, or USS table by doing a RCEFIND to find the
  table location and then a RCEADD of the table name. However,
  the parmlist used to do the RCEADD is not the one output by the
  RCEFIND, and is uninitialized. So the table name is never added
  and the use count for the table is not incremented.
  
  When an APPL is inactivated, though, the use count for the table
  is decremented. In this way, the use count can get to zero or
  a negative number, allowing the table to be deleted. Then
  further  attempts to OPEN application ACBs result in the
  ACBERROR=X'5A' because the table cannot be found.
  

Problem conclusion

• Module ISTSDCLO has been changed to use the parameter list
  created by the RCEFIND as input to the RCEADD so that the
  correct table name will be added and the use count incremented.
  Module ISTCPC00 has been included to force prereq OW16245 and
  to add the module eyecatcher.
  

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:

  UW32792

Modules/Macros

• ISTCPC00 ISTSDCLO
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R301 PSY UW32792

     UP96/11/02 P F611

Fix is available

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