libjingle-call: 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/libjingle-call - from package: kopete

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

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