I had previously been in touch with you regarding the calibration of SWMM. I have managed to successfully implement a local optimization technique. Now that i am looking a global optimizatin technique, i require a much larger number of iterations. Under some infiltration parameter values, the system will produce a warning message stating that the Horton's Infiltration Equation has not converged. Looking at the code of SWMM, this occurs whenever a particular parameter value is below 0.001*DELT. I have set up my program to neglect the output produced from such a set of data, but i was wondering what the implication of this non-convergence is? Does it reflect in the output in any way?