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Hi Junchao,
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<div>This is a recent item we added to the errata. I don't believe it has been merged into the online errata yet. </div>
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<div>The text for the errata is:</div>
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<p> page 568, line 31 add: Any output parameter to MPI_T_cvar_get_info can have a NULL value. In this case, the implementation will ignore the parameter and not return a value for that parameter.
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<p>page 576, line 46 add: Any output parameter to MPI_T_pvar_get_info can have a NULL value. In this case, the implementation will ignore the parameter and not return a value for that parameter.
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<p>page 586, line 22 add: Any output parameter to MPI_T_category_get_info can have a NULL value. In this case, the implementation will ignore the parameter and not return a value for that parameter.</p>
<p>You can see the evolution of this change here:</p>
<div><a href="https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/378">https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/378</a></div>
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<div>Kathryn</div>
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<div>On Sep 23, 2013, at 4:03 PM, Junchao Zhang <<a href="mailto:jczhang@mcs.anl.gov">jczhang@mcs.anl.gov</a>> wrote:</div>
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<div>Hello,</div>
<div> For function "int MPI_T_pvar_get_info(int pvar_index, char *name, int *name_len, int *verbosity, int *var_class, ...)", MPI_T defines semantics when name or name_len are NULL. </div>
<div> But for other args, if they are NULL, is it a user program error or should we just ignore it? I prefer the latter. But the standard doesn't say it.</div>
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<div> Thanks</div>
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<div dir="ltr">--Junchao Zhang</div>
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<div>______________________________________________________________<br>
Kathryn Mohror, <a href="mailto:kathryn@llnl.gov">kathryn@llnl.gov</a>, <a href="http://people.llnl.gov/mohror1">http://people.llnl.gov/mohror1</a><br>
CASC @ Lawrence Livermore National Laboratory, Livermore, CA, USA</div>
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