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How to interpret the columns of the Log file when we set MIPLOG at 3 and why it is not the same description in the Dash documentation?

Question asked by sana.dahm on Apr 28, 2017
Latest reply on May 9, 2017 by sana.dahm

Hi,

I want to understand some features related to the log file. To do this, I'll take an example:

Branch  Parent      Solution Entity           Value/Bound Active   GInf   Time

         1       0   173882312.4 C6101             .60000000       2    196      2

         2       1   173886029.1 C638              .00000000       1    211      2

         5       2   173888487.8 C5923             .45820871       1    207      3

         6       5U  173893483.4 C641              .00000000       1    209      3

         9       6   173893957.6 C6438             .39958974       1    182      3

       11       9   173895135.4 C1045             .16666667       1    172      3

        12      11   173904903.0 C21305            5.7500000       1    165      3

        14      12U  173907258.6 C5283             .30000000       1    181      4

        16      14U  173926629.3 C24221            1.6250000       1    175      4

        18      16U  173928663.9 C2490             .30000000       1    156      4

        20      18U  173947231.1 C2085             .10000000       1    147      4

        22      20U  173955177.3 C21431            199.55952       1    156      4

        24      22U  173958067.3 C6727            -1.692e-12       1    148      4

        27      24   173958773.8 C6644             .63817330       1    137      4

        29      27   173959407.0 C643              .14215686       1    124      5

        30      29U  173963718.7 C7930             .10526316       1    124      5

       33      30   173965296.9                   .00000000       1     80      5

        35      33   173966335.3 C6737             .00000000       1    101      5

        37      35   173966379.8                   .00000000       1     78      5

        38      37   173966414.4 C16578            7.7461538       1    112      5

 

  1. For example, in node 33 why there is no global entity on which we branch?!
  2. In the documentation the column Value/Bound gives the value of the variable and a letter U or L to say if the bound added is a lower or upper one. If we see the column Vale/Bound there is no information on the type of the bound added.
  3. What is the meaning of the U and D in the parent node? if it means Up and Down why it is put in the parent node number and why it is not appearing all the time?
  4. What is the meaning of ACTIVE nodes? Clearly, it not the unexplored node. I am confused :

 

Thanks a lot !!!

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