IT18587: PCOM: FTP CLIENT CRASHES WHEN SENDING FILES TO Z/OS HOST IF USING TLS ENCRYPTION

IBM Personal Communications 12.0.2
Personal Communications 6.0.19

APAR status

• Closed as program error.

Error description

• Customer reports that the FTP client from PCOM 6.0.13 on
  Win2012 crashes frequently if the session is TLS encrypted with
  MSCAPI. No problems with un-encrypted sessions.
  
  After IT16574, the receive works fine even for big data sets
  (10GB) but send is still crashing if large files are used.
  Small files are OK
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Personal Communications users of the FTP Client.         *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When PCOM FTP Client is configured with MSCAPI Security, the *
  * client crashes when large files are being sent to a z/OS     *
  * host.                                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  FTP client crashes when sending large files to a z/OS host if a
  secure connection is made using MSCAPI Security. Buffer
  size was not managed correctly for sending larger files.
  

Problem conclusion

• PCSFTP code changes have been made to correct the size of buffer
  used to send large files.
  
  Fix scheduled for PCOM 6.0.19 Refresh Pack and 12.0.2.0 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

• pcsftp
  

Fix information

• Fixed component name

  PCOMM COMBO-ENG

• Fixed component ID

  5639I7000

Applicable component levels

• R60G PSY

     UP

• RC00 PSY

     UP