Martini FF, polymer, Segmentation fault (core dumped)

EMC
1

I am using Martini FF for polymer, but I am getting a segmentation fault (core dumped). What is the issue?

ITEM OPTIONS

field martini/v2.0/martini.prm
density 0.85
temperature 600
ntotal 20
replace true
emc_execute true

ITEM END

ITEM GROUPS

pp [C1], &
2,pp:1

end *[C1], &
1,pp:1

ITEM END

ITEM CLUSTERS

polypropylene random, 1

ITEM END

ITEM POLYMERS

polypropylene
1 pp,20, end,2

ITEM END