<div style="DIRECTION: ltr">Hi Ted,<br><br>Thank you for your reply. You understood correctly. It is a column<br>generation heuristic for an IP. We want to try this approach first<br>and see if we can get away with it as implementing branch-and-price is
<br>rather involved and time consuming.<br><br>Your suggestions help a lot. We tried dumping the MPS file from<br>SYMPHONY and reading it back to CLP to solve it. We did get what we<br>want, i.e., IP solution and dual prices. We haven't yet tried
<br>modifying CLP code. If we need to go that far and if we get stuck, we<br>will be sure to ask for your advice again!<br><br>Thank you for your time. We appreciate your help very much.<br><br>Cheers,<br> </div><br>--
<br>-Yossiri Adulyasak-<br>Graduate Student<br>Transportation Engineering Program<br>Department of Civil Engineering <br>Chulalongkorn University<br>Tel 0-6616-6495<br>a.yossiri -at- <a href="http://gmail.com">gmail.com</a>