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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT
face="Times New Roman"><FONT color=#000000><FONT size=3><SPAN
class=687183502-14072004>Dear </SPAN>COIN Team,</FONT></FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p><FONT face="Times New Roman"
color=#000000 size=3> </FONT></o:p></P>
<P class=PhDWork style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: normal"><FONT
face="Times New Roman"><FONT color=#000000><FONT size=3>I am implementing a
Branch-and-price algorithm in a serial environment.<SPAN
style="mso-spacerun: yes"> </SPAN>I have a question about heuristic
solutions in <SPAN class=687183502-14072004>BCP using
</SPAN></FONT></FONT></FONT><FONT face="Times New Roman" color=#000000
size=3>“<SPAN
style="BACKGROUND: white; mso-highlight: white">p.user->generate_heuristic_solution</SPAN>()”</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><o:p><FONT face="Times New Roman"
color=#000000 size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"
color=#000000 size=3>Suppose I have found an improved heuristic
solution:</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><o:p><FONT face="Times New Roman"
color=#000000 size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"
color=#000000 size=3>Some of those variables (columns) in the heuristic solution
are new and I saw that they receive an index.</FONT><FONT face="Times New Roman"
color=#000000 size=3><SPAN style="mso-spacerun: yes"> </SPAN>But, how are
they appended to the other variables?</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"
color=#000000 size=3>I mean, those new variables may not conform to the
branching rules for the current node, so they should not be include in the
current model.</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"
color=#000000 size=3>Can the new variables be used in any other node, or by
default they receive an index but they are not inserted on the model?</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"
color=#000000 size=3>If I want to include those new variables, do I have to
recreate then and insert the model?</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><o:p><FONT face="Times New Roman"
color=#000000 size=3> </FONT></o:p></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT face="Times New Roman"
color=#000000 size=3>Thanks and congratulations for the nice work,</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><FONT
color=#000000><FONT face="Times New Roman">Eduardo. <SPAN
style="mso-spacerun: yes"> </SPAN></FONT></FONT></FONT></FONT></P></DIV></BODY></HTML>