DrAmine,nnThe analytical solution is displayed as a blue line on the plot in my previous post.nThe information on it and the rest of the important details are given in the very first postnI apologize for the length of the the lengthiness of this thread, I was trying to present the information in a detailed manner. nUnfortunately, for me this forum is the only resource that can answer these kind of questions. I use an academic license that I got from the IT department of my college and I don?t think that based on that I can access the Customer Portal.nWould you recommend starting a new thread with the question regarding the analytical solution mismatch?.Thank you,nnVladimirn