How to change the display setting of CPLEX 12.6.3 in Yalmip and make it show message every iter?

[Xinwei Shen]

I want to make MIP solving process show message every iter, so I write

"ops=sdpsettings('solver','cplex','cplex.Display','iter');"

However, it didn't work even though the ops.cplex.Display has become 'iter'

[Xinwei Shen]

I found out that it's because the MIP log information is not enough.

According to http://www.ibm.com/support/knowledgecenter/en/SS9UKU_12.5.0/com.ibm.cplex.zos.help/Parameters/topics/MIPInterval.html

Now I want to set mip.display=5

How can I make it with the function "sdpsetting"?

[Johan Löfberg]

ops = sdpsettings('cplex.mip.display',5)

Options + MATLAB + cplex has been a disaster since day 1 though, so I wouldn't be surprised if it simply doesn't work. For instance cplex+matalb 2016b crashes if the complete options structure is used, and cplex 12.6.2 and earlier completely disregarded options, and some versions have behaved very strangely with display options.

You'll have to put a break in call_cplexibm_miqp to see if the option actually is set when the call is made to binary. If it is, and you don't get the display you expect, you're simply seeing yet another issue with cplex display issues

[Xinwei Shen]

It showed 

"Unrecognized property name 'cplex.mip.display' ",

it seems that there's no such structure in ops.cplex.

Thanks anyway.

[Mark L. Stone]

Look up and use the parameter number per my post in https://groups.google.com/forum/#!topic/yalmip/A8mMjAyAlhA . I don't know whether that will work for you, but it's worth a try.

[Johan Löfberg]

If you are using MATLAB 2016a or earlier, you have that option

>> ops = sdpsettings;

>> ops.cplex.mip.display

ans =

     2

In MATLAB2016b + 12.6.3, there is a bug which causes cplex to crash if we use the complete options structure, so YALMIP only creates cplex limited set of options

https://www.ibm.com/developerworks/community/forums/html/topic?id=79772c01-f545-44ef-9543-257197f1d9e7&ps=25

[Xinwei Shen]

It's very strange that There is no "ops.cplex.mip" in my YALMIP.

>> opss=sdpsettings;

>> opss.cplex

ans = 

                Display: 'on'

                MaxIter: 9.2234e+18

              Algorithm: 'auto'

         BranchStrategy: 'maxinfeas'

               MaxNodes: 9.2234e+18

                MaxTime: 1.0000e+75

    NodeDisplayInterval: 20

     NodeSearchStrategy: 'bn'

                 TolFun: 1.0000e-06

              TolRLPFun: 1.0000e-06

            TolXInteger: 1.0000e-05

            ExportModel: ''

What happened to my YALMIP or matlab or CPLEX?

[Johan Löfberg]

As I said in the previous answer. You're using cplex on matlab 2016. cplex has a bug on matlab 2016, and to avoid cplex to crash matlab, YALMIP only allows cplex to create a limited set of options. If you look in sdpsettings

if strfind(version,'2016')

        cplex = cplexoptimset;

    else

        cplex = cplexoptimset('cplex');

        cplex.output.clonelog = 0;

    end   

if you run cplexoptimset('cplex') on your machine, it will very likely crash. If it doesn't, you can remove the check for version and simply change it to cplex = cplexoptimset('cplex');

        cplex.output.clonelog = 0;, and the complete options structure will be created.

[Xinwei Shen]

It seems that there is no problem for me to "remove the check for version", nothing crashes.

Btw, 

My Matlab version is R2016a; 

Cplex version is 12.6.3.0; 

Windows version is Win10 Education 64-bit.

[Johan Löfberg]

Yes, I think the a-version works, problem is only in b

[reza mehrabadi]

Hi. I've tested the following code (latest ver. YALMIP and 2018b(also 2016a) + cplex 12.7.1) to have more info while solving:

ops = sdpsettings('solver','cplex','cplex.display','on');

%ops.verbose= 2;

%ops.barrier.display=2;

ops.cplex.mip.display=3;

%ops.showprogress = 1;

but still no effects and, after the solution completes:

The mip display is still set on 1. Testing again the:

ops.cplex.mip.display

ans =

     3

 

[Johan Löfberg]

the only working cplex version is 12.8