picprog: 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 CentOS possible default full paths are:

/usr/bin/picprog - from package: picprog

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/picprog - from package: picprog

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

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