IC72880: PCOM: PROG706 (INVALID CHAIN) OCCURS AFTER PCOM RECEIVED READ BUFFER (X02) AND THEN IAC EOR (XFFEF) SEPARATELY

Personal Communications 6.0.2
Personal Communications 5.9.8

APAR status

• Closed as program error.

Error description

• Customer connects to TX/AIX server
  via basic TN3270 session ( not TN3270E session ).
  The problem is that Prog706 appears after the specific
  operations.
  .
  The trace shows
  TX                   Pcom
  --------------------------
    <-----Enter--------
    ------Read Buffer-->
    <----Buffer to read--
    ------ IAC EOR ---->
    ----- Write screen->
   .
   TX server sends IAC EOR for Read Buffer command separately.
   Pcom returns its buffer *BEFORE* receiving the IAC/EOR
   and then if the session receives the next screen,
   it reports Prog706 (invalid chain).
   User can reset Prog706 by pressing reset key.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All 3270 telnet emulation users.             *
  ****************************************************************
  * PROBLEM DESCRIPTION: PROG706 error occurs when PCOM receives *
  *                      a READ Buffer command and IAC EOR in    *
  *                      separate packets.                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When PCOM receives a READ Buffer command 0xF2 in a TN3270E
  packet that does not end in 0xFFEF (IAC EOR) Command Chaining
  is set and the next TN3270E packet is receivd, a chaining
  error is detected and PROG706 is issued.
  

Problem conclusion

• PCSTLNET.DLL has been changed to not set Command Chaining when
  a READ Buffer command is received in a TN3270E telnet packet
  without End of Record.
  
  Fix scheduled for PCOM 5.9.8 Manufacturing Refresh
  Fix scheduled for PCOM 6.0.3 Manufacturing Refresh
  

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 V5 COMBO-

• Fixed component ID

  5639I7000

Applicable component levels

• R590 PSY IP23349

     UP12/05/09 I 1000

• R601 PSY

     UP