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The authors have been developing a strong migration mobile agent system in Java. Using the system, we are developing the platform of an autonomic distributed processing system, called AgentSphere. In this research, a mechanism so that an agent can create a backup of itself which includes data in the middle of execution is implemented. In order to use this mechanism, a user describes backup commands in the agent's code. The backed-up agent is sent into other AgentSphere. And when an original agent stops according to an unexpected situation, the backed-up agent will start its activity instead of original one in order to resume its processing. Moreover, the method to insert backup commands automatically in suitable positions of an agent's code is proposed. Furthermore, this paper also describes the implementation of a scheduler which performs initial distribution of agents and the communication functions between agents in AgentSphere.