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<div><blockquote cite="mid:2015110314504541431417@163.com" type="cite"><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:_Foxmail.1@81cd5ae8-5b5e-c37a-8f03-80c44a66f639" border="0" style="max-width: 100%; height: auto !important;"></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>
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