Mr. Richard and Mr. Anindya, thanks a lot for the time you took in preparing and typing your reply!

I got what I came for from this forum. Although I was looking for a quick-fix or a written doctrine on how to solve convergence problems  But I realized from reading your reply and other topics in the forum that you can only know the general thing that is causing your non-convergence issue and from there you’re on your own of discovering the right way (or may be one of the right ways) in solving your problem thru common sense, logic, trial and error, educated guesses and –many times- by pure luck 

One last thing before I close this topic, I was hoping that the developers of CII would take my suggestion on evolving the F2 function to display the non-converging nodes and their status in layman’s terms. And it would be more appreciated if they would also explain what is wrong with those nodes and give suggestions on how to solve them in understandable engineering terms 

Thank you all. Have a good day.