Hello Forum,

I’ve been running my model by using the Barrier solver from the CPLEX package. I need to display somehow the progress of my variables in each barrier iteration. Basically, from my set of variables a,b,c (bonded by upper and lower boundaries) I want to see their current value in each iteration. By default, Barrier Log shows the value of my solving variable (Z). Is it possible to display (either in the log or output file) the corresponding variables value in each iteration?

This is an example of my current Log file, here only the objective (solving) variable value is displayed for every single iteration. Again, I need to display values for specific variables.

Number of nonzeros in lower triangle of A*A’ = 5640475

Using Nested Dissection ordering

Total time for automatic ordering = 15.66 sec. (10704.70 ticks)

Summary statistics for Cholesky factor:

Threads = 3

Rows in Factor = 1348316

Integer space required = 5227076

Total non-zeros in factor = 28452852

Total FP ops to factor = 2399506370

Itn Primal Obj Dual Obj Prim Inf Upper Inf Dual Inf Inf Ratio

0 6.9701522e+015 -2.6217957e+018 5.88e+011 1.72e+011 7.37e+010 1.00e+000

1 6.5869267e+015 -1.9787580e+018 5.04e+011 1.48e+011 5.57e+010 4.56e-010

2 6.5418387e+015 -1.2189360e+018 4.97e+011 1.46e+011 3.43e+010 2.82e-010

3 6.2116718e+015 -8.5359691e+017 3.38e+011 9.92e+010 2.41e+010 1.92e-010

4 4.2689435e+015 -6.7770141e+017 1.72e+011 5.03e+010 1.91e+010 2.07e-010

5 1.7614126e+015 -1.4292956e+017 5.08e+010 1.49e+010 4.05e+009 5.99e-010

6 9.6962729e+014 -3.7492286e+016 2.05e+010 6.00e+009 1.07e+009 1.19e-009

and so on…

I hope there’s a way to do it!,

Regards