Hi Rajesh,
What looks strange here is that the server has a path of:/opt/sybase/ASE-15_0/bin/dataserver -sT10 -d/opt/sybase/data/master.dat -e/opt/sybase/ASE-15_0/install/T10.log -c/opt/sybase/ASE-15_0/T10.cfg -M/opt/sybase/ASE-15_0 > /dev/null 2>&1
This appears to be a 15.0 server. Make sure your environment variable are setup properly and your server is started under the ASE-16_0 path.
Jack