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<h1>FAQ<a class="headerlink" href="#faq" title="Permalink to this headline">¶</a></h1>
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<tr class="field-odd field"><th class="field-name">Q:</th><td class="field-body"><p class="first">I followed the installation instructions but when I do</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">pygraphviz</span>
</pre></div>
</div>
<p>I get an error like
ImportError: libagraph.so.1: cannot open shared object file: No
such file or directory</p>
<p>What is wrong?</p>
</td>
</tr>
<tr class="field-even field"><th class="field-name">A:</th><td class="field-body"><p class="first">Some Unix systems don’t include the Graphviz library in the
default search path for the run-time linker. The path is often
something like /usr/lib/graphviz or /sw/lib/graphviz etc. and
it needs to be added to your search path. You can</p>
<ol class="arabic simple">
<li>set the LD_LIBRARY_PATH environment variable
e.g. export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/lib/graphviz</li>
<li>configure your system with the additional path.
e.g. for Linux add a line to /etc/ld.so.conf and
run ldconfig</li>
</ol>
</td>
</tr>
<tr class="field-odd field"><th class="field-name">Q:</th><td class="field-body"><p class="first">How do I compile pygraphviz under Windows? And why
don’t you distribute a pygraphviz Windows installer?</p>
</td>
</tr>
<tr class="field-even field"><th class="field-name">A:</th><td class="field-body"><p class="first">We don’t have Windows development machines but would like to
have pygraphviz work on all platforms. If you have success
with Windows or would be willing to help test and distribute a
Windows installer please drop us a note.</p>
<dl class="last docutils">
<dt>See also tickets: <a class="reference external" href="https://networkx.lanl.gov/trac/ticket/117">https://networkx.lanl.gov/trac/ticket/117</a></dt>
<dd><p class="first last"><a class="reference external" href="https://networkx.lanl.gov/trac/ticket/491">https://networkx.lanl.gov/trac/ticket/491</a></p>
</dd>
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