Scenario-based verification is introduced as a technique to deal with the complexity of coordination languages, which feature both data manipulation and concurrency. The approach is exemplified by a verification study of the software architecture Splice that is used by Hollandse Signaalapparaten. A detailed specification of Splice, including the Ethernet network that Splice is using, is written in the process-algebraic language μcrl and for a number of selected scenarios the transition system is automatically generated. For the resulting models, the properties of deadlock freeness, soundness, and weak completeness are automatically proven by model checking.