_SET_SUFFIX .a
c: DISTANCE ATOMS=1,2
d: DISTANCE ATOMS=2,3

# this is a dummy file, just to enable checking
PRINT FILE=colvar ARG=c

# the HILLS file are not really checked here since non-mpi walkers are not reproducible
# however, this example crashes
single: METAD ARG=c,d SIGMA=0.1,0.2 HEIGHT=0.1 PACE=2  WALKERS_ID=0 WALKERS_DIR=. WALKERS_N=3 WALKERS_RSTRIDE=1

