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  34. <h4 class="subsection">D.7.3 <code>gslint</code> exceptions</h4>
  35. <p>If an argument of an inappropriate form can be detected (such as an
  36. empty pair or one without floating point numbers), it causes an error
  37. message to be returned saying
  38. <a name="index-bad-integral-specification-731"></a>
  39. <pre class="example"> &lt;'bad integral specification'&gt;
  40. </pre>
  41. <p class="noindent">Error messages signalled by the integrand <var>f</var> may also be
  42. reported, as well as any message returned by <code>gsl_strerror</code>. A
  43. typical cause for a <code>gsl_strerror</code> message would be an explicitly
  44. specified tolerance that is too tight. An error message of
  45. <a name="index-slow-convergence-732"></a>
  46. <pre class="example"> &lt;'slow convergence'&gt;
  47. </pre>
  48. <p class="noindent">is returned in the event of excessively many function evaluations
  49. (currently 3600 at each tolerance level).
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