Replace ASA11 with ASA12 in the path names to set the ERSSD environment variables.
In Prerequisites for Replication Server Recovery in the Replication Server Administration Guide Volume 1, replace ASA11 with ASA12.
On Windows:
Set your environment variable PATH to include %SYBASE%\%SYBASE_REP%\ASA12\win32:
set PATH=%SYBASE%\%SYBASE_REP%\ASA12\win32;%PATH%