The Data Dictionary System is an I/O System (and much more) capable of handling multi-dimensional seismic datasets. For more information, see https://freedds.org/.
The fix is to change the line All:= $(shell PATH=${USERPATH} ; ${DDSROOT}/src/lib/host/HostComp -a ${Args})
to All:= $(shell PATH="${USERPATH}" ; ${DDSROOT}/src/lib/host/HostComp -a ${Args})