Terribly slow simulation // NN Predictive Controler.

Hello.

I happen to have some problems with simulations of systems with NN Predictive Controler.

At first, I thought the XY Graph was a problem, but I removed it so I could write the data directly to the workspace from simulations using both NARMA-L2 controler and Predictive controler, and now simulations with NARMA-L2 are done instantly, while the ones with Predictive controler take more than 1 hour (!) for simulation time 50. What is wrong?

Looking forward to any help from you guys.