PN88255: C-FTP WRITES RECFM=VB BLOCK THAT CONFLICTS WITH BDW. RESULT IS I/O ERROR WHEN TRYING TO READ/EDIT THAT FILE LATER

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The customer gets an I/O error during the READ/WRITE
  on a file that has been transfered via the FTP-C.
  This occurs only under C-runtime library 2.1.
  The FTP-C writes RECFM=VB block that conflict with BDW (block
  descriptor word) .Result is I/O error when trying to read/edit
  that file later.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of MVS 3.2 TCP/IP C-FTP server     *
  ****************************************************************
  * PROBLEM DESCRIPTION: C-FTP writes RECFM=VB block that        *
  *                      conflicts with BDW. The result is an    *
  *                      I/O error when trying to READ/EDIT that *
  *                      dataset later.                          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The customer gets an I/O error during the READ/WRITE on a file
  that has been transfered via the FTP-C.
  The FTP-C writes RECFM=VB block that conflict with BDW (block
  descriptor word). Result is I/O error when trying to read/edit
  that dataset later.
  

Problem conclusion

• The V2R1 C runtime is incorrectly determining maximum
  record length for fwrite during fopen for recfm=u. Module
  EZAFTSMV was changed to specify the blocksize to the C-runtime
  library, thereby not allowing the C-runtime to determine it.
     Other customers have reported problem corrected when they
  move to C runtime LE/370 1.3 and up.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PN85450

• APAR is sysrouted TO one or more of the following:

  UN94533

Modules/Macros

• EZAFTSMV
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R320 PSY UN94533

     UP96/09/02 P F608

Fix is available

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