Compact large-signal modeling of nonlinear MMIC devices is a one of the most essential topics for the microwave community. Many different nonlinear modeling techniques have been suggested in the last years and a significant progress has been made in measurement tools. However, as the number of measured points increases, traditional verification approaches based on simple comparison between measured and simulated data become inefficient and time consuming. Moreover, in order to avoid inconsistent errors, every new nonlinear modeling technique should be verified for convergence and repeatability of the results being obtained before real applications. In this paper a simple approach to verify the convergence of the automatic nonlinear modeling technique will be discussed. An algorithm of automatic verification of a compact HEMT model directly in NI AWR software is demonstrated.