IT29213: PCOM: SCREEN ERROR WHEN SWITCHING TO TLS SECURE CONNECTION

APAR status

• Closed as program error.

Error description

• I am using PCOMM V13.0.2 version.  The same error occurred on
  V13.0.0 before I upgraded.
  
  When I connect to z/OS TN3270 without security everything works
  fine.  When I change the session to connect in with 'Enable
  Security' checked then everything works fine up to a certain
  point.  Then I type in the INGLIST command  under SAZOS and I
  get either a full screen of data with x-clock (keyboard never
  unlocks) or I get some of the screen with an XPROG755 in the
  OIA.
  
  The only way to get out of this is to use Windows task manager
  to terminate everything called PCSWS.EXE and PCSCM.EXE.  Then I
  can restart PCOMM.
  

Local fix

• Add keyword - ReceiveBufferSize=32768 to Telnet3270 section of
  WS profile
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All IBM Personal Communications users                        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When a user switches from an active non-secure session to a  *
  * secure session and then issues some host command that sends  *
  * a large amount of data, the user may get X-clock or PROG753  *
  * error.                                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Steps to reproduce:
  1. Open a PCOM non-secure session
  2. Connect to the 3270 host
  3. Go to Communication - Configure - Link Parameters - Security
  Setup and check the Enable Security box
  4. Enter the secure port number
  5. Click Apply and OK
  6. Click OK for re-connection
  7. Login to host and traverse to the host screen that sends a
  large amount of data to the emulator
  Either of the below errors may be seen by the user.
  1. X-Clock will appear in the OIA
  2. Partial screen updates with PROG753 in the OIA
  

Problem conclusion

• PCOM used to read the Security configuration settings only when
  launching the session and allocated the Receive Buffer Size
  memory of 8k for non-secure and 32k for secure sessions. When
  the user switches from active non-secure to secure, PCOM was not
  re-allocating the Receive Buffer Size to 32k.
  PCSTLNET.DLL has been changed to read the Security configuration
  settings even when the user re-connects so the correct Receive
  Buffer Size memory is allocated for secure sessions.
  Fix scheduled for PCOM 12.0.5 and 13.0.3 and 14.0.1 Refresh
  Packs
  

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

• PCSTLNET
  

Fix information

• Fixed component name

  PCOMM COMBO-ENG

• Fixed component ID

  5639I7000

Applicable component levels