When simulating in a robust manner with a channel error bound(zeta) of 0.05, it is possible to generate a plot. However, when simulating in a non-robust manner with a channel error bound of 0, it consistently results in an error as following, why? thanks

[Mark_L_Stone]

Same advice as for this recent thread:

Problem: Illegal operation: {real affine} - {invalid}

Also, use Mosek as solver if you have access to it, otherwise see CVXQUAD: How to use CVXQUAD's Pade Approximant instead of CVX's unreliable Successive Approximation for GP mode, log, exp, entr, rel_entr, kl_div, log_det, det_rootn, exponential cone. CVXQUAD's Quantum (Matrix) Entropy & Matrix Log related functions . Also, improve the numerical scaling of the problem so that non-zero input data is within a small number of orders of magnitude of one.