 see
if they are acceptable for your application. If they are not, consider some of the
other advice here to see if the solvability of your model may be improved.</dd>
<dt><em>Remove constraints.</em></dt>
<dd>If you think that one or more of the constraints might
not be active at the solution, try removing them. If the solver terminates, you can
confirm that your guess was correct by examining the solution to the modified problem.</dd>
<dt><em>Add constraints</em>.</dt>
<dd>Consider adding simple bounds to