PI73124: LOOP IN TN3270 WHEN INVALID USSMSG IS SENT TO CLIENT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Loop in EZBTPUSW offset C1C when sending a USSMSG to a telnet
  client that ended with a Start Field order x'1D' with no
  attribute byte following it.
  
  Additional symptom: ABEND0C4 in EZBTPUSW
  

Local fix

• Correct the USSMSG10 / USSMSG7 to avoid this loop
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server                   *
  * z/OS Version 2 Releases 1 and 2: IP Telnet facilities        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Loop in EZBTPUSW when using USSTAB                           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF                                                    *
  ****************************************************************
  The problem may be summarized as follows:
  1. The system has a customized USSTAB with a 3270 order as the
  last byte.
  2. A Telnet client connects to the Telnet server using the
  USSTAB
  3. A loop occurs in EZBTPUSW
  
  Another possible symptom: an ABEND0C4 in EZBTPUSW
  

Problem conclusion

• Telnet is updated to prevent the loop in EZBTPUSW.
  

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:

  UI43255 UI43256

Modules/Macros

• EZBTPUSW
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R220 PSY UI43256

     UP17/05/15 P F705

• R210 PSY UI43255

     UP17/05/15 P F705

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.