ica: 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/ica - from package: italc-client

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

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