hmm2convert: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/hmm2convert - from package: hmmer2

You may install the required package with command apt-get install {package}

Error in other languages:
hmm2convert: bevel nie gevind nie
hmm2convert: comandă negăsită
hmm2convert: comando não encontrado
hmm2convert: commande introuvable
hmm2convert: command not found
hmm2convert: käsku ei ole
hmm2convert: không tìm thấy lệnh
hmm2convert: komanda nerasta
hmm2convert: Kommando nicht gefunden.
hmm2convert: kommandot finns inte
hmm2convert: komut yok
hmm2convert: nie znaleziono polecenia
hmm2convert: níor aimsíodh an t-ordú
hmm2convert: no se encontró la orden
hmm2convert: no s'ha trobat l'ordre
hmm2convert: opdracht niet gevonden
hmm2convert: parancs nem található
hmm2convert: perintah tidak ditemukan
hmm2convert: príkaz nenájdený
hmm2convert: příkaz nenalezen
hmm2convert: команда не найдена
hmm2convert: командата не е открита
hmm2convert: 命令找不到
hmm2convert: コマンドが見つかりません