critcl: 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/critcl - from package: critcl

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

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