Abstract: Application servers, AS, for use in live and test enterprise resource planning, ERP, systems and a test ERP system for testing an update to the live ERP system are described. A system transaction recorder of the live ERP system captures live system transaction data comprising a plurality of live system transaction inputs and a plurality of live system transaction outputs. A receiver of an AS of the test ERP system receives the system transaction data and a system tester applies the plurality of live system transaction inputs to a plurality of test ERP system transactions corresponding to the plurality of system transactions undertaken in the live ERP system, such that a plurality of test system transaction outputs are produced. An error detector determines whether there has been any error in the test ERP system based on the plurality of test system transaction outputs.

Abstract: The present invention provides a method of and apparatus for implementing changes within a data system. The method receiving a request including one or more objects to be imported into a data system, creating a back up request comprising a copy of the objects included within the request, implementing the back up request in the system to generate a modified back up request including a log of the objects modified in the request, storing the modified back up request. This allows a log of changes to objects in the data system to be generated using a copy of a request including a list of changes to the objects. Once the modified back up request has been generated the request may be imported into the system.

Abstract: The present invention relates to searching a system including multiple stores of data which are discrete from each other. The method includes: receiving a search parameter including an identifier, for the identifier, retrieving an other identifier related to the identifier, identifying one or more data stores associated with the identifier and the other identifier, and for each identified data store searching the data store using the identifier or the other identifier associated with the data store.