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<title>Numerical integration error codes - GNU Scientific Library -- Reference Manual</title>
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<h3 class="section">16.11 Error codes</h3>
<p>In addition to the standard error codes for invalid arguments the
functions can return the following values,
<dl>
<dt><code>GSL_EMAXITER</code><dd>the maximum number of subdivisions was exceeded.
<br><dt><code>GSL_EROUND</code><dd>cannot reach tolerance because of roundoff error,
or roundoff error was detected in the extrapolation table.
<br><dt><code>GSL_ESING</code><dd>a non-integrable singularity or other bad integrand behavior was found
in the integration interval.
<br><dt><code>GSL_EDIVERGE</code><dd>the integral is divergent, or too slowly convergent to be integrated
numerically.
</dl>
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