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<h1>Status codes</h1>
<table style="margin-top:2em; margin-bottom:1em;">
<tr><th>The code</th><th>Description</th></tr>
<tr><td class="c">0</td>
<td>Success, results are both reliable and accurate</td></tr>
<tr><td class="c">1</td>
<td>Success, results are reliable, can be inaccurate due rounding</td></tr>
<tr><td class="c">2</td>
<td>Success, a basic estimate for a single point or a pair</td></tr>
<tr><td class="c">3</td>
<td>Success, majority of data looks identical.</td></tr>
<tr><td class="c">5</td>
<td>Fail, improper input parameters
(<samp>reltol, scale < 0</samp>, etc.)</td></tr>
<tr><td class="c">6</td>
<td>Fail, no convergence or a unexpected error</td></tr>
<tr><td class="c">8</td>
<td>Fail, failed to allocate a memory.</td></tr>
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<p>
The status codes < 5 indicates the success,
whilst ≥ 5 stands for a fail.
Some subroutines use codes above ten for an inter-routine communication.
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<p>
<samp>verbose = .true.</samp> is helpfull in doubts.
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