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<h4 class="subsection">D.17.3 <code>umf</code> exceptions</h4>

<p>If an exceptional condition arises from the use of this library, one
of the following lists of character strings may be returned as the
function result.

     <ul>
<li><code>&lt;'memory overflow'&gt;</code> means the library function ran out of
memory, most likely due to a matrix being too large. 
<li><code>&lt;'bad umf specification'&gt;</code> means an input parameter didn't
<a name="index-bad-umf-specification-816"></a>conform to the appropriate format described above (<a href="umf-input-parameters.html#umf-input-parameters">umf input parameters</a>)
<li><code>&lt;'umf error'&gt;</code> covers any unexpected behavior or abnormal
<a name="index-umf-error-817"></a>status returned by any function from the C language API. 
</ul>

   <p>For the *<code>_trp</code> functions. A non-square matrix will cause the
second exception above. For the *<code>_col</code> functions, a non-square
matrix will cause the third exception or cause an empty result
to be returned.

   <p>The exceptions noted at the beginning of this section (<a href="External-Libraries.html#External-Libraries">External Libraries</a>) are also possible.

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