In this paper, some convergence theorems of Ishikawa type iterative sequence with errors for nonlinear generalized quasi-contractive mapping in convex metric spaces are proved. The results presented in this paper not only extend and improve the main results in [1-8] but also give an affirmative answer to the open question of Rhoades-Naimpally-Singh in convex metric spaces. (C) 2003 Elsevier Science Ltd. All rights reserved.