Embedded Replication Server System Database (ERSSD) requires SAP® SQL Anywhere®, which is compatible with 64-bit versions operating system.
If you are upgrading to SAP Replication Server 15.7.1 SP200 on Solaris SPARC, Solaris 10 x64, or IBM AIX, and using ERSSD, platforms must be 64-bit for the upgrade to function properly. For these operating systems, ERSSD can only be run on 64-bit machines. This is a restriction of the underlying SAP SQL Anywhere database.