IC86546: PCOM: 3270 SESSION HANGS RUNNING USER APPLICATION SINCE UPGRADE FROM PCOM 5.7.2

Personal Communications 6.0.6 (V6.0, Manufacturing Refresh 6)

APAR status

• Closed as program error.

Error description

• Since upgrading to PCOM 6.0.1, users of a vendor application
  report the "A" session hangs and gives Not Responding prompt
  from Windows. This may happen when 4-5 sessions are active.
  When one session is hung, the others work OK.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users connecting to a single instance of *
  *                 a PCOM emulator using a EHLLAPI application  *
  *                 and VB Script macro at the same time.        *
  ****************************************************************
  * PROBLEM DESCRIPTION: PCOM session freezes when multiple      *
  *                      applications access the emulator.       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When multiple applications (EHLLAPI, VB Script macro) access
  the Presentation Space at the same time, a race condition can
  occur and it causes the emulator to freeze or hang.
  

Problem conclusion

• PCSWSAPI.DLL, PCSECLVC.DLL and PCSPREF.DLL have been changed
  to improve the code that handles locking of the presentation
  space.
  
  To enable this new code, a keyword must be added to the active
  PCSWIN.INI file for each user on the Windows machine. The
  default value for this new keyword in NO.
  
  Edit the PCSWIN.INI file with a ASCII editor and add:
  
  [API]
  Advanced_Locking=Y
  
  Save the INI file and restart all emulator sessions.
  
  Fix is scheduled for PCOM 6.0.6 Refresh Pack
  

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:

Modules/Macros

• PCSECLVC PCSPREF  PCSWSAPI
  

Fix information

• Fixed component name

  PCOMM V5 COMBO-

• Fixed component ID

  5639I7000

Applicable component levels

• R601 PSY

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