scs2pdf: 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/scs2pdf - from package: tn5250

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

Error in other languages:
scs2pdf: bevel nie gevind nie
scs2pdf: comandă negăsită
scs2pdf: comando não encontrado
scs2pdf: commande introuvable
scs2pdf: command not found
scs2pdf: käsku ei ole
scs2pdf: không tìm thấy lệnh
scs2pdf: komanda nerasta
scs2pdf: Kommando nicht gefunden.
scs2pdf: kommandot finns inte
scs2pdf: komut yok
scs2pdf: nie znaleziono polecenia
scs2pdf: níor aimsíodh an t-ordú
scs2pdf: no se encontró la orden
scs2pdf: no s'ha trobat l'ordre
scs2pdf: opdracht niet gevonden
scs2pdf: parancs nem található
scs2pdf: perintah tidak ditemukan
scs2pdf: príkaz nenájdený
scs2pdf: příkaz nenalezen
scs2pdf: команда не найдена
scs2pdf: командата не е открита
scs2pdf: 命令找不到
scs2pdf: コマンドが見つかりません