Dr. Parkhurst: Hello, how are you ! Very thankful of your previous help. But I still can not work out of the convergency problem. Attached is an input file for kinetic sumulation. Though the simulation results sounds ok, but it also warns me like this: *** WARNING: Error: maximum iterations exceeded, 100 Numerical method failed with this set of convergence parameters. WARNING: Trying smaller step size, pe step size 10, 5 ... WARNING: Error: maximum iterations exceeded, 200 Numerical method failed with this set of convergence parameters. WARNING: Trying diagonal scaling ... **** Though I have tried the smaller step or Rung_kuta methods, it didn't work. Could you please tell me if there is any other way to solve this problem. If no choice, how confident i can use the final result ? Due to the importance of this simulation result, I don't want to risk any in-CONSPIRACY. But i do need some kind of simulation result. So here i have to come to you for help again. Very appreciated of your help. Young Wang Binghamton University Binghamton, New York 13903
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