Originally posted by: TF87

Hello.

I want to build a QP. I've read the documentation for cplex.addQCs

http://www-01.ibm.com/support/knowledgecenter/SSSA5P_12.6.0/ilog.odms.cplex.help/refmatlabcplex/html/classCplex.html%23a21779992067abbd5fceb8df298322e51?lang=de

but when I use the given example

cplex.addQCs([0 0 0]',[1 0 0;0 1 0;0 0 1],'L',1,{'qc1'});

I get the following error

Error using Cplex/addQCs (line 3378)
Cplex.addQCs Error: a has incompatible dimensions.
Error in Cplex/subsref (line 3852)

Do you know what is wrong, since it is just the example from the documentation?

I'm using MATLAB R2014a & CPLEX Studio 12.5

Thanks in advance.

Best regards.

Originally posted by: RWunderling

Please verify that the dimensions of a and Q match the number of variables in your model.

Roland

Originally posted by: TF87

Okay, the order is crucial. The addQCs method must be used at the end of constructing my model.

Now it works, thank your very much.