PM71354: READING MULTI-BUFFERED TAPE MAY ENOUNTER EDC5066I READ ERROR

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When reading from a Tape volume using fread() following a
  reposition you may encounter a failing return code from fread()
  accompanied with this errno/errno2:
  
  EDC5066I A read system error was detected. (errno2=0xC0380005)
  
  
  Verification Steps:
  1) Verify target dataset resides on a tape volume.
  2) Verify I/O is multi-bufferred.
  3) Determine if a reposition has been performed and a read
  operation is failing.
  4) If a dump is available, you should may also find a synad
  entry in the systrace.
  

Local fix

• Run with a single buffer to circumvent this problem.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of z/OS C/C++ reposition functions     *
  *                 on a multi-buffered tape dataset.            *
  ****************************************************************
  * PROBLEM DESCRIPTION: Users of a multi-buffered tape dataset  *
  *                      that reach EOD, and then reposition     *
  *                      may get a failing return code, along    *
  *                      with this errno/errno2:                 *
  *                      EDC5066I A read system error was        *
  *                      detected. (errno2=0xC0380005)           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  See problem description.
  

Problem conclusion

• The code was changed to fix the problem.
  

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:

  UK93742 UK93743

Modules/Macros

•    CELHIO31 CELQIO31 CEL4IO31
  

Fix information

• Fixed component name

  LE C LIBRARY

• Fixed component ID

  568819805

Applicable component levels

• R770 PSY UK93742

     UP13/05/08 P F305

• R780 PSY UK93743

     UP13/05/08 P F305

Fix is available

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