$HERest -A -D -T 1 -C config -I phones0.mlf -t 250.0 150.0 1000.0 -S train.scp -H hmm1/macros -H hmm1/hmmdefs -M hmm2 monophones0

i ran the above command but got the following error

 5010 cant open  the source file -S

plz help me regarding this