The invention provides a method, system and computer program product for determining the configuration of a data processing system at the time a transaction was processed. A transaction is received from a client device and tracked through the data processing network. Each processing node within the data processing network is assigned a unique identifier which identifies the configuration of the processing node. As the transaction is routed from one processing node to the next, the unique identifier of the processing node is stored to form a transaction path. Once the transaction has been committed to storage, a unique value is generated uniquely identifying a particular transaction path permutation.