HP OpenVMS Systems

OPCDEC on TCP/IP (UCX) sys$qio accept?

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The Question is:

 
a qio accept in a ucx fortran program returns
'%system-f-opcdec, opcode reserved to digital
fault at pc=00000202, psl=03c00000 break on
unhandled exception at 514' when i connect from
a unix client. please advise.
 

The Answer is :

 
  The program likely has a bug in the particular argument passing, or
  in the variables used by the program.  Look for stack corruption(s),
  for buffer overruns, for synchronization- or timing-related problems,
  for variables no longer in scope when the AST is triggered, etc.
 
  Without an example of the application source and without the full
  stackdump typically produced, it is extremely difficult to provide
  specifics.  Also consider using process dumps and the debugger to
  try to locate and resolve the particular cause.
 
	--
 OPCDEC,  opcode reserved to Digital fault at PC='location',
          PSL='xxxxxxxx'
 
  Facility:     SYSTEM, System Services
 
  Explanation:  The operation code at the indicated address is not known.
                This message indicates an exception condition and is usually
                followed by a display of the condition arguments, registers,
                and stack at the time of the exception.
 
  User Action:  Examine the PC and virtual address displayed in the message to
                determine the instruction that caused the error.
 
	--
 
  Also, in general, upgrade to a recent version of TCP/IP Services for
  OpenVMS (UCX), and apply the associated ECO kit.  (The Wizard would
  not assume that this upgrade will resolve the particular problem
  reported here, however.)
 

  

     

     
answer written or last revised on ( 19-NOV-1998 )
     
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