how to run KMC with assembly genome (fasta）

[Aannaw]

hello I am confusion with the command for the kmc count kmer with assembly genome (fasta). I actually do not find an example. My command is kmc -k21 -ci0 -t40 -m20 -fa a.fasta ./tmp. No error is present but the program is clapsed. Looking forward with reply. Thanks very much.