>HERest -A -D -T 1 -C config -I phones0.mlf -t 250.0 150.0 1000.0 -S

>train.scp -H hmm0/macros -H hmm0/hmmdefs -M hmm1 monophones0

>ERROR [+5021] GetChkedInt: Integer Arg Required for 1 option

as stated above in the thread, have you interpreted the letter 'I' wrong way in the execute command after config and before phones0.mlf . This letter 'I' is uppercase i not lowercase L