[SCIP] A question about initial solution of branch and price.

[weikaimas at 163.com]

Hi, 
  
 I have a branch and price algorithm. I am facing a problem when I set the initial solution.

When I set the parameter to zero for each variable in objective function, SCIP shows the primal bound is 30. 

In my problem, the primal bound given by SCIP also 30 unit bigger than the real primal bound.

I don't know why this happens.
I attach the initial model and SCIP result in the following.

\ENCODING=ISO-8859-1
\Problem name: mymodel

Minimize
 obj:
Subject To
 Constraint0:   x_1_1  = 30
 Constraint1:   x_2_1  = 10
 Constraint2:   x_3_1  = 30
 Constraint3:   x_4_1  = 19
 Constraint4:   x_5_1  = 17
 Constraint5:   x_6_1  = 22
 Constraint6:   x_7_1  = 28
 Constraint7:   x_8_1  = 21
 Constraint8:   x_9_1  = 27
 Constraint9:   x_10_1  = 20
 Constraint10:  x_11_1  = 10
 Constraint11:  x_12_1  = 21
 Constraint12:  x_13_1  = 14
 Constraint13:  x_14_1  = 11
 Constraint14:  x_15_1  = 28
 Constraint15:  x_16_1  = 21
 Constraint16:  x_17_1  = 21
 Constraint17:  x_18_1  = 20
 Constraint18:  x_19_1  = 16
 Constraint19:  x_20_1  = 24
 Constraint20:  - RgConstraint20  = 0
 Constraint21:  - RgConstraint21  = 0
 Constraint22:  - RgConstraint22  = 0
 Constraint23:  - RgConstraint23  = 0
 Constraint24:  - RgConstraint24  = 0
 Constraint25:  - RgConstraint25  = 0
 Constraint26:  - RgConstraint26  = 0
 Constraint27:  - RgConstraint27  = 0
 Constraint28:  - RgConstraint28  = 0


best regard,

Kai Wei

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