Three files comprise ePiX: a shell script ( epix), a header file ( epix.h), and a compiled library ( libepix.a). The utility script laps is part of the distribution, but independent from ePiX proper. These components are placed into standard locations where they can find each other. The likeliest problems with ePiX are that some component (usually epix itself) cannot find the other pieces, or that the shell cannot find epix.