start_vc/1 goal, and persists until it is explicitly terminated. VisClientName becomes instantiated to an atom which can be used when the VC is to be stopped. For start_vc to work correctly, ECLiPSe needs to know where to find the Java installation. To check whether this is so, use find_java/1. If the result of find_java/1 is not the root directory of a Java installation (at least version 1.2.2) then the behaviour of start_vc/1 prints an error message and fails.