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   <h3 class="sectionHead"><span class="titlemark"><span 
class="cmr-12">7   </span></span> <a 
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class="cmr-12">Error Handling</span></h3>
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class="cmr-12">The error handling in AMG4PSBLAS is based on the PSBLAS error handling. Error</span>
<span 
class="cmr-12">conditions are signaled via an integer argument </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">info</span></span></span><span 
class="cmr-12">; whenever an error condition is</span>
<span 
class="cmr-12">detected, an error trace stack is built by the library up to the top-level, user-callable</span>
<span 
class="cmr-12">routine. This routine will then decide, according to the user preferences, whether</span>
<span 
class="cmr-12">the error should be handled by terminating the program or by returning the</span>
<span 
class="cmr-12">error condition to the user code, which will then take action, and whether</span>
<span 
class="cmr-12">an error message should be printed. These options may be set by using the</span>
<span 
class="cmr-12">PSBLAS error handling routines; for further details see the PSBLAS User&#8217;s Guide</span>
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