Does IloCplex::Param::MIP::Display parameter restrict information displayed related to repairing singularity...
The warnings that I henceforth refer to are as follows; repairing basis singularity, added to 1 column super-basic list and Markowitz threshold set to 0.3.
Will toggling the IloCplex::Param::MIP::Display parameter value between 2 (default) and 5 switch off and on the display of above-mentioned warnings in the log file respectively. Assume that the above-mentioned issues arise in the LP sub-problems inside the branch-cut and bound tree.
cplex integer-programming mixed-integer-programming
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
add a comment |
The warnings that I henceforth refer to are as follows; repairing basis singularity, added to 1 column super-basic list and Markowitz threshold set to 0.3.
Will toggling the IloCplex::Param::MIP::Display parameter value between 2 (default) and 5 switch off and on the display of above-mentioned warnings in the log file respectively. Assume that the above-mentioned issues arise in the LP sub-problems inside the branch-cut and bound tree.
cplex integer-programming mixed-integer-programming
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
add a comment |
The warnings that I henceforth refer to are as follows; repairing basis singularity, added to 1 column super-basic list and Markowitz threshold set to 0.3.
Will toggling the IloCplex::Param::MIP::Display parameter value between 2 (default) and 5 switch off and on the display of above-mentioned warnings in the log file respectively. Assume that the above-mentioned issues arise in the LP sub-problems inside the branch-cut and bound tree.
cplex integer-programming mixed-integer-programming
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
The warnings that I henceforth refer to are as follows; repairing basis singularity, added to 1 column super-basic list and Markowitz threshold set to 0.3.
Will toggling the IloCplex::Param::MIP::Display parameter value between 2 (default) and 5 switch off and on the display of above-mentioned warnings in the log file respectively. Assume that the above-mentioned issues arise in the LP sub-problems inside the branch-cut and bound tree.
cplex integer-programming mixed-integer-programming
cplex integer-programming mixed-integer-programming
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
asked Nov 19 '18 at 7:25
Anurag LadageAnurag Ladage
1
1
add a comment |
add a comment |
2 Answers
2
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The "Repairing basis singularity" and "Markowitz threshold set to" messages are controled by the IloCplex::Param::Simplex::Display parameter (aka CPX_PARAM_SIMDISPLAY). I'm not sure about the other message ("added to 1 column super-basic list"), which version of CPLEX are you using?
As mentioned in the documentation for IloCplex::Param::MIP::Display:
A setting of 5 additionally generates entries for the LP subproblems,
also according to the setting of the parameter to control the simplex
iteration information display (SimDisplay, CPX_PARAM_SIMDISPLAY).
So, when you toggle the value of IloCplex::Param::MIP::Display between 2 and 5, it should control whether the warnings you mentioned are displayed or not if the value of IloCplex::Param::Simplex::Display is greater than 0.
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
add a comment |
After some experimentation, I finally reached this conclusion. Irrespective of the IloCplex::Param::Simplex::Display parameter setting if the IloCplex::Param::MIP::Display = 5 then it displays the 'repairing basis singularity' and 'added to 1 column super-basic list' even for LP sub-problems.
In contrast, setting the IloCplex::Param::MIP::Display = 2 (default) display the basis singularity related issues only for the root node LP.
Finally, Markowitz Tolerance message gets displayed for both IloCplex::Param::MIP::Display = 5 and IloCplex::Param::MIP::Display = 2.
Just putting it out there in case anyone requires it in the future. Additionally, these messages might point towards numerical issues in the data.
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me atrkersh at us dot ibm dot com?
– rkersh
Nov 27 '18 at 20:30
add a comment |
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2 Answers
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2 Answers
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The "Repairing basis singularity" and "Markowitz threshold set to" messages are controled by the IloCplex::Param::Simplex::Display parameter (aka CPX_PARAM_SIMDISPLAY). I'm not sure about the other message ("added to 1 column super-basic list"), which version of CPLEX are you using?
As mentioned in the documentation for IloCplex::Param::MIP::Display:
A setting of 5 additionally generates entries for the LP subproblems,
also according to the setting of the parameter to control the simplex
iteration information display (SimDisplay, CPX_PARAM_SIMDISPLAY).
So, when you toggle the value of IloCplex::Param::MIP::Display between 2 and 5, it should control whether the warnings you mentioned are displayed or not if the value of IloCplex::Param::Simplex::Display is greater than 0.
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
add a comment |
The "Repairing basis singularity" and "Markowitz threshold set to" messages are controled by the IloCplex::Param::Simplex::Display parameter (aka CPX_PARAM_SIMDISPLAY). I'm not sure about the other message ("added to 1 column super-basic list"), which version of CPLEX are you using?
As mentioned in the documentation for IloCplex::Param::MIP::Display:
A setting of 5 additionally generates entries for the LP subproblems,
also according to the setting of the parameter to control the simplex
iteration information display (SimDisplay, CPX_PARAM_SIMDISPLAY).
So, when you toggle the value of IloCplex::Param::MIP::Display between 2 and 5, it should control whether the warnings you mentioned are displayed or not if the value of IloCplex::Param::Simplex::Display is greater than 0.
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
add a comment |
The "Repairing basis singularity" and "Markowitz threshold set to" messages are controled by the IloCplex::Param::Simplex::Display parameter (aka CPX_PARAM_SIMDISPLAY). I'm not sure about the other message ("added to 1 column super-basic list"), which version of CPLEX are you using?
As mentioned in the documentation for IloCplex::Param::MIP::Display:
A setting of 5 additionally generates entries for the LP subproblems,
also according to the setting of the parameter to control the simplex
iteration information display (SimDisplay, CPX_PARAM_SIMDISPLAY).
So, when you toggle the value of IloCplex::Param::MIP::Display between 2 and 5, it should control whether the warnings you mentioned are displayed or not if the value of IloCplex::Param::Simplex::Display is greater than 0.
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
The "Repairing basis singularity" and "Markowitz threshold set to" messages are controled by the IloCplex::Param::Simplex::Display parameter (aka CPX_PARAM_SIMDISPLAY). I'm not sure about the other message ("added to 1 column super-basic list"), which version of CPLEX are you using?
As mentioned in the documentation for IloCplex::Param::MIP::Display:
A setting of 5 additionally generates entries for the LP subproblems,
also according to the setting of the parameter to control the simplex
iteration information display (SimDisplay, CPX_PARAM_SIMDISPLAY).
So, when you toggle the value of IloCplex::Param::MIP::Display between 2 and 5, it should control whether the warnings you mentioned are displayed or not if the value of IloCplex::Param::Simplex::Display is greater than 0.
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
answered Nov 19 '18 at 16:53
rkershrkersh
2,17621523
2,17621523
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
add a comment |
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
Using cplex 12.7.1. Haven't touched the IloCplex::Param::Simplex::Display parameter setting. I ask this question because for lot of instances I get no warnings when I run them using IloCplex::Param::MIP::Display = 2. For the same instances if IloCplex::Param::MIP::Display = 5 then I start seeing this warnings. Just want to make sure that these warnings are not affected by the MIP display parameter.
– Anurag Ladage
Nov 20 '18 at 2:01
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
What is your goal? Do you want to make sure that the warnings are always shown? Or, do you want to make sure that they are never shown?
– rkersh
Nov 21 '18 at 0:42
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
Trying to figure out whether there is a bug in Cplex. Just wanted to make sure toggling the display parameters is not affecting the above mentioned messages.
– Anurag Ladage
Nov 27 '18 at 0:33
add a comment |
After some experimentation, I finally reached this conclusion. Irrespective of the IloCplex::Param::Simplex::Display parameter setting if the IloCplex::Param::MIP::Display = 5 then it displays the 'repairing basis singularity' and 'added to 1 column super-basic list' even for LP sub-problems.
In contrast, setting the IloCplex::Param::MIP::Display = 2 (default) display the basis singularity related issues only for the root node LP.
Finally, Markowitz Tolerance message gets displayed for both IloCplex::Param::MIP::Display = 5 and IloCplex::Param::MIP::Display = 2.
Just putting it out there in case anyone requires it in the future. Additionally, these messages might point towards numerical issues in the data.
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me atrkersh at us dot ibm dot com?
– rkersh
Nov 27 '18 at 20:30
add a comment |
After some experimentation, I finally reached this conclusion. Irrespective of the IloCplex::Param::Simplex::Display parameter setting if the IloCplex::Param::MIP::Display = 5 then it displays the 'repairing basis singularity' and 'added to 1 column super-basic list' even for LP sub-problems.
In contrast, setting the IloCplex::Param::MIP::Display = 2 (default) display the basis singularity related issues only for the root node LP.
Finally, Markowitz Tolerance message gets displayed for both IloCplex::Param::MIP::Display = 5 and IloCplex::Param::MIP::Display = 2.
Just putting it out there in case anyone requires it in the future. Additionally, these messages might point towards numerical issues in the data.
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me atrkersh at us dot ibm dot com?
– rkersh
Nov 27 '18 at 20:30
add a comment |
After some experimentation, I finally reached this conclusion. Irrespective of the IloCplex::Param::Simplex::Display parameter setting if the IloCplex::Param::MIP::Display = 5 then it displays the 'repairing basis singularity' and 'added to 1 column super-basic list' even for LP sub-problems.
In contrast, setting the IloCplex::Param::MIP::Display = 2 (default) display the basis singularity related issues only for the root node LP.
Finally, Markowitz Tolerance message gets displayed for both IloCplex::Param::MIP::Display = 5 and IloCplex::Param::MIP::Display = 2.
Just putting it out there in case anyone requires it in the future. Additionally, these messages might point towards numerical issues in the data.
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
After some experimentation, I finally reached this conclusion. Irrespective of the IloCplex::Param::Simplex::Display parameter setting if the IloCplex::Param::MIP::Display = 5 then it displays the 'repairing basis singularity' and 'added to 1 column super-basic list' even for LP sub-problems.
In contrast, setting the IloCplex::Param::MIP::Display = 2 (default) display the basis singularity related issues only for the root node LP.
Finally, Markowitz Tolerance message gets displayed for both IloCplex::Param::MIP::Display = 5 and IloCplex::Param::MIP::Display = 2.
Just putting it out there in case anyone requires it in the future. Additionally, these messages might point towards numerical issues in the data.
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
answered Nov 27 '18 at 0:41
Anurag LadageAnurag Ladage
1
1
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me atrkersh at us dot ibm dot com?
– rkersh
Nov 27 '18 at 20:30
add a comment |
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me atrkersh at us dot ibm dot com?
– rkersh
Nov 27 '18 at 20:30
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me at
rkersh at us dot ibm dot com?– rkersh
Nov 27 '18 at 20:30
Is it possible to share the model that you get this behavior with by editing your question? If not, can you share the model (export to SAV format) with me at
rkersh at us dot ibm dot com?– rkersh
Nov 27 '18 at 20:30
add a comment |
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