ERP implementation and post implementation initiatives involve organizational changes. Conflicts, due to technology and processes, regularly arise in such a change process and the dialectic model of change is useful to understand such conflicts. The categorization of ERP conflicts can provide a better understanding of ERP implementation. The aim of this research-in-progress paper is thus to develop a categorization of ERP conflicts. We expressed this ERP categorization in terms of four scenarios which are in turn based on two characteristics: sources of conflicts and types of conflicts.