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<head><title>Error Handling</title>
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<!--l. 1--><div class="crosslinks"><p class="noindent"><span
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class="cmr-12">] </span></p></div>
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<h3 class="sectionHead"><span class="titlemark"><span
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class="cmr-12">7 </span></span> <a
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id="x28-320007"></a><span
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class="cmr-12">Error Handling</span></h3>
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<!--l. 5--><p class="noindent" ><span
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class="cmr-12">The error handling in AMG4PSBLAS is based on the PSBLAS error handling. Error</span>
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<span
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class="cmr-12">conditions are signaled via an integer argument </span><span class="obeylines-h"><span class="verb"><span
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class="cmtt-12">info</span></span></span><span
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class="cmr-12">; whenever an error condition is</span>
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<span
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class="cmr-12">detected, an error trace stack is built by the library up to the top-level, user-callable</span>
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<span
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class="cmr-12">routine. This routine will then decide, according to the user preferences, whether</span>
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<span
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class="cmr-12">the error should be handled by terminating the program or by returning the</span>
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<span
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class="cmr-12">error condition to the user code, which will then take action, and whether</span>
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<span
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class="cmr-12">an error message should be printed. These options may be set by using the</span>
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<span
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class="cmr-12">PSBLAS error handling routines; for further details see the PSBLAS User’s Guide</span>
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<span class="cite"><span
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class="cmr-12">[</span><a
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class="cmr-12">20</span></a><span
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class="cmr-12">]</span></span><span
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class="cmr-12">.</span>
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<!--l. 1--><div class="crosslinks"><p class="noindent"><span
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