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<H1><A NAME="SECTION04700000000000000000">Troubleshooting</A></H1>
<A NAME="troubleshooting"> </A><A NAME="6177"> </A>
<P>
<A NAME="6178"> </A><A NAME="6179"> </A><A NAME="6180"> </A><A NAME="6181"> </A><A NAME="6182"> </A><A NAME="6183"> </A>
Successful installation, testing, and use of ScaLAPACK rely heavily
on the proper installation of its building blocks (PVM or MPI, BLACS, BLAS,
and PBLAS). Frequently Asked Questions (FAQ) lists are maintained in the
directories on <EM>netlib</EM> to answer some of the most common
user questions. For the user's convenience, prebuilt
ScaLAPACK and BLACS libraries are provided for a variety of computer
architectures in the following URLs:
<BLOCKQUOTE> <TT>http://www.netlib.org/scalapack/archives/</TT> <BR>
<TT>http://www.netlib.org/blacs/archives/</TT>
</BLOCKQUOTE>
<P>
Test suites are provided for PVM, the BLACS, the BLAS, and
the PBLAS. It is highly recommended that each of these respective test
suites be run prior to the execution of the ScaLAPACK test suite.
Installation Guides<A NAME="6189"> </A> are also provided for the BLACS and ScaLAPACK. Refer
to the appropriate directory on <EM>netlib</EM> for further information.
<P>
We begin this chapter by discussing a set of first-step debugging
hints to pinpoint where the problem is occurring.
Following these debugging hints, we discuss the types of
error messages that can be encountered during the execution of a ScaLAPACK
routine: ScaLAPACK error messages, PBLAS error messages, BLACS
error messages, and system-dependent error messages or failures.
<P>
If these suggestions do not help evaluate specific difficulties,
we suggest that the user review the following ``bug report checklist'' and then
feel free to contact the authors at <TT>scalapack@cs.utk.edu</TT><A NAME="6192"> </A><A NAME="6193"> </A> or
<TT>blacs@cs.utk.edu</TT>, respectively. The user should tell us the type of machine
on which the tests were run, the compiler and compiler options that were
used, details of the BLACS library and message-passing library that were
used and the BLAS library; also, the user should send a copy of the input file, if appropriate.
<P>
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<UL><A NAME="CHILD_LINKS"> </A>
<LI> <A NAME="tex2html4023" HREF="node147.html#SECTION04720000000000000000">Installation Debugging Hints</A>
<LI> <A NAME="tex2html4024" HREF="node148.html#SECTION04730000000000000000">Application Debugging Hints</A>
<LI> <A NAME="tex2html4025" HREF="node149.html#SECTION04740000000000000000">Common Errors in Calling ScaLAPACK Routines</A>
<LI> <A NAME="tex2html4026" HREF="node150.html#SECTION04750000000000000000">Failures Detected by ScaLAPACK Routines</A>
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<LI> <A NAME="tex2html4027" HREF="node151.html#SECTION04751000000000000000">Invalid Arguments and PXERBLA</A>
<LI> <A NAME="tex2html4028" HREF="node152.html#SECTION04752000000000000000">Computational Failures and INFO > 0</A>
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<LI> <A NAME="tex2html4029" HREF="node153.html#SECTION04760000000000000000">Wrong Results</A>
<LI> <A NAME="tex2html4030" HREF="node154.html#SECTION04770000000000000000">Error Handling in the PBLAS</A>
<LI> <A NAME="tex2html4031" HREF="node155.html#SECTION04780000000000000000">Error Handling in the BLACS</A>
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<LI> <A NAME="tex2html4032" HREF="node156.html#SECTION04781000000000000000">BLACS Warning and Error Messages</A>
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<LI> <A NAME="tex2html4033" HREF="node157.html#SECTION04790000000000000000">System Error Messages</A>
<LI> <A NAME="tex2html4034" HREF="node158.html#SECTION047100000000000000000">Poor Performance</A>
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<P><ADDRESS>
<I>Susan Blackford <BR>
Tue May 13 09:21:01 EDT 1997</I>
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