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Dear Kai Wei,<br>
<br>
when I run your model SCIP shows an optimal objective value of 0.<br>
Please check again that your code actually does what you want. You
may try compiling in debug mode ("make OPT=dbg") and enabling more
debug output ("#define SCIP_DEBUG" at the top of source files) to
find out what's going on.<br>
<br>
all the best<br>
Matthias<br>
<br>
<div class="moz-cite-prefix">On 03.11.2015 09:16, <a class="moz-txt-link-abbreviated" href="mailto:weikaimas@163.com">weikaimas@163.com</a>
wrote:<br>
</div>
<blockquote cite="mid:2015110316162875981612@163.com" type="cite">
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charset=windows-1252">
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<div><span></span>Hi Matthias,</div>
<div><br>
</div>
<div>Thanks for your reply.</div>
<div><br>
</div>
<div>I did not attach all my model in the last email. I attach
this model in this email.</div>
<div><br>
</div>
<div>The model is printed by <span style="font-family: '';
font-size: 10.5pt; line-height: 1.5; background-color:
window;"> SCIP_CALL( SCIPwriteLP(scip, "N_initial_model.lp") ),
in my code.</span></div>
<div><span style="font-family: ''; font-size: 10.5pt; line-height:
1.5; background-color: window;"><br>
</span></div>
<div>SCIP shows the objective value is 30 (see the picture I
attached in my last email).</div>
<div><br>
</div>
<div>I checked all my code without finding any mistake.</div>
<div><br>
</div>
<div>Would like to give me some suggeations.</div>
<div><br>
</div>
<div>Best regard,</div>
<div><br>
</div>
<div>Kai Wei.</div>
<div><br>
</div>
<blockquote style="margin-top: 0px; margin-bottom: 0px;
margin-left: 0.5em;">
<div> </div>
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<div><b>From:</b> <a moz-do-not-send="true"
href="mailto:miltenberger@zib.de">Matthias Miltenberger</a></div>
<div><b>Date:</b> 2015-11-03 15:55</div>
<div><b>To:</b> <a moz-do-not-send="true"
href="mailto:weikaimas@163.com">weikaimas@163.com</a></div>
<div><b>CC:</b> <a moz-do-not-send="true"
href="mailto:scip@zib.de">scip</a></div>
<div><b>Subject:</b> Re: [SCIP] A question about initial
solution of branch and price.</div>
</div>
</div>
<div>
<div class="FoxDiv20151103160135363713"> Hey Kai Wei,<br>
<br>
I do not see how the model you described corresponds to the
SCIP output you sent us. Where are the 337 constraints
coming from?<br>
I suppose there's something wrong in your own code.<br>
<br>
all the best<br>
Matthias<br>
<br>
<div class="moz-cite-prefix">On 03.11.2015 08:20, <a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:weikaimas@163.com"><a class="moz-txt-link-abbreviated" href="mailto:weikaimas@163.com">weikaimas@163.com</a></a>
wrote:<br>
</div>
<blockquote cite="mid:2015110315203400629521@163.com"
type="cite" style="margin-top: 0px; margin-bottom: 0px;
margin-left: 0.5em;">
<div><span></span><br>
</div>
<div>
<blockquote cite="mid:2015110314504541431417@163.com"
type="cite" style="margin-top: 0px; margin-bottom:
0px; margin-left: 0.5em;">
<div>Hi, </div>
<div><span style="font-size: 10.5pt; line-height:
1.5;"> </span></div>
<div><span style="font-size: 10.5pt; line-height:
1.5;"> I have a branch and price algorithm. I am
facing a problem when I set the initial solution.</span></div>
<div><span style="font-size: 10.5pt; line-height:
1.5;"><br>
</span></div>
<div>When I set the parameter to zero for each
variable in objective function, SCIP shows the
primal bound is 30. </div>
<div><br>
</div>
<div>In my problem, the primal bound given by SCIP
also 30 unit bigger than the real primal bound.</div>
<div><br>
</div>
<div>I don't know why this happens.</div>
<div>I attach the initial model and SCIP result in the
following.</div>
<div><br>
</div>
<div><span microsoft="" yahei="" ui'";=""
font-size:="" 14px;="" color:="" rgb(0,="" 0,=""
0);="" background-color:="" rgba(0,=""
font-weight:="" normal;="" font-style:=""
normal;text-decoration:="" none;'=""
style="font-family: '';">\ENCODING=ISO-8859-1<br>
\Problem name: mymodel<br>
<br>
Minimize<br>
obj:<br>
Subject To<br>
Constraint0: x_1_1 = 30<br>
Constraint1: x_2_1 = 10<br>
Constraint2: x_3_1 = 30<br>
Constraint3: x_4_1 = 19<br>
Constraint4: x_5_1 = 17<br>
Constraint5: x_6_1 = 22<br>
Constraint6: x_7_1 = 28<br>
Constraint7: x_8_1 = 21<br>
Constraint8: x_9_1 = 27<br>
Constraint9: x_10_1 = 20<br>
Constraint10: x_11_1 = 10<br>
Constraint11: x_12_1 = 21<br>
Constraint12: x_13_1 = 14<br>
Constraint13: x_14_1 = 11<br>
Constraint14: x_15_1 = 28<br>
Constraint15: x_16_1 = 21<br>
Constraint16: x_17_1 = 21<br>
Constraint17: x_18_1 = 20<br>
Constraint18: x_19_1 = 16<br>
Constraint19: x_20_1 = 24<br>
Constraint20: - RgConstraint20 = 0<br>
Constraint21: - RgConstraint21 = 0<br>
Constraint22: - RgConstraint22 = 0<br>
Constraint23: - RgConstraint23 = 0<br>
Constraint24: - RgConstraint24 = 0<br>
Constraint25: - RgConstraint25 = 0<br>
Constraint26: - RgConstraint26 = 0<br>
Constraint27: - RgConstraint27 = 0<br>
Constraint28: - RgConstraint28 = 0</span></div>
<div><br>
</div>
<div><img src="cid:part5.09060707.02060005@zib.de"
style="max-width: 100%; height: auto !important;"
border="0"></div>
<div><span style="font-size: 10.5pt; line-height:
1.5;"><br>
</span></div>
<div><span style="font-size: 10.5pt; line-height:
1.5;">best regard,</span></div>
<div><span style="font-size: 10.5pt; line-height:
1.5;"><br>
</span></div>
<div><span style="font-size: 10.5pt; line-height:
1.5;">Kai Wei</span></div>
</blockquote>
</div>
<div>
<div><span style="font-size: 10.5pt; line-height: 1.5;"><br>
</span></div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
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<pre class="moz-signature" cols="72">--
\__________________
Matthias Miltenberger
Zuse Institute Berlin
Takustr. 7, 14195 Berlin
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="http://www.zib.de/miltenberger">www.zib.de/miltenberger</a>
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:miltenberger@zib.de">miltenberger@zib.de</a>
+49 (30) 841 85-245</pre>
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<pre class="moz-signature" cols="72">--
\__________________
Matthias Miltenberger
Zuse Institute Berlin
Takustr. 7, 14195 Berlin
<a class="moz-txt-link-abbreviated" href="http://www.zib.de/miltenberger">www.zib.de/miltenberger</a>
<a class="moz-txt-link-abbreviated" href="mailto:miltenberger@zib.de">miltenberger@zib.de</a>
+49 (30) 841 85-245</pre>
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