imcat: 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/imcat - from package: im

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

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