Originally posted by: raswalgul

Hello,

I used the set_quadratic() function to add a Q matrix for a quadratic objective following the exact format as in the example. However, it shows the following error:

cplex.exceptions.errors.CplexSolverError: CPLEX Error  1226: Array entry 99 not ascending.

Q is a diagonal matrix of size 98. 

I searched around the closest I could find is described here: http://www.vioja.com/linear-and-quadratic-terms-in-cplex-objective-function/

Is there a better way to make this work?

Thanks in advance.

That link looks to be a site which copies content from stackoverflow (and not very well). The original thread is here. Take a look at that and see if it doesn't answer your questions.