%T Protocol Verification in Millipede %A Jan Bækgaard Pedersen, Alan Wagner %E Alan G. Chalmers, Majid Mirmehdi, Henk Muller %B Communicating Process Architectures 2001 %X In this paper we present the MOPED module of the Millipede debugging system. Millipede is a multi\-level debugging sytem for parallel message passing programs. MOPED allows the user to specify a protocol to which the communication of the program should adhere, and authomatically have all the messages sent in the system checked against the protocol. The specification language is small and easy to use, yet powerful enough to specify a wide range of protocols. Program variables can be passed easily to the verification module, allowing the construction of mode dynamic protocol specifications. Protocols can be specified incrementally, starting out very general working towards a more complex specification. Finally, the verification module can be run either online, that is, while the application is executing, or offline, using log files generated when the application was executed.