Whats the difference between release versions and service packs?
Release versions are the actual program versions. Service packs are used to update the program or release versions. They contain enhancements and fixes of the respective release version. They are cumulative, i.e. the current service pack always contains all previous ones. A service pack can only be used to update the respective release version, i.e. if you want to use service pack 9.50001, you need a basic installation of VISUM 9.5.