System Version and Software Version Relationship

You can use the full capabilities of software version 15.5 and later when the system version is at 1260 or later.

Replication Server Software Version System Version 1260 and Later
15.7.1 SP100 Full capability when site version is set to 1571100
15.7.1 Full capability when site version is set to 1571
15.7 Full capability when site version is set to 1570
15.6 and 15.5 Full capability when site version is set to 1550
15.2 Full capability when site version is set to 1520
15.1 Full capability when site version is set to 1510
15.0 and 15.0.1 Full capability when site version is set to 1500
12.6 Full capability when site version is set to 1260

For example, new features of version 15.7.1 SP100 are available only when the system version is at least 1260 and the site version is set to 1571100.

If a software version is supported with full capability at a given system version, you can install new Replication Servers of that software version.