In some circumstances you may want to run more than one executable as a service, and these executables may depend on each other. For example, you may want to run a server and a SQL Remote Message Agent or Log Transfer Manager to assist in replication.
In cases such as these, the services must start in the proper order. If a SQL Remote Message Agent service starts before the server has started, it fails because it cannot find the server.
You can prevent these problems by using service groups, which you manage from Sybase Central.