an> <span class="DecNumber">-20</span></pre></dt>
<dd>

Memory allocation error

</dd>
<a id="MP_ERR_NAN"></a>
<dt><pre><a href="mpfit_wrapper.html#MP_ERR_NAN"><span class="Identifier">MP_ERR_NAN</span></a> <span class="Other">=</span> <span class="DecNumber">-16</span></pre></dt>
<dd>

User function produced non-finite values

</dd>
<a id="MP_ERR_NFREE"></a>
<dt><pre><a href="mpfit_wrapper.html#MP_ERR_NFREE"><span class="Identifier">MP_ERR_NFREE</span></a> <span class="Other">=</span> <span class="DecNumbe