ProteinResolver: 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/ProteinResolver - from package: topp

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

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