This study focuses on documenting the barriers of knowledge integration between the organizational culture and the bestpractices supported by an ERP system using an Action Research approach. The findings contribute to the ERP literature because they provide managers with different knowledge integration barriers that appear during ERP implementation, and how authors, using an AR methodology, surpassed these problems. Moreover, this study offers a knowledge integration perspective to understand the ERP implementation as a whole process that involves internal and external stakeholders. In this regard, the training with a holistic vision is suggested to increase the likelihood of success of the ERP implementation project. Finally, some trends for future research are provided. © (2009) by the AIS/ICIS Administrative Office All rights reserved.