tsdiscont: command not found

Have You tried accessing the binary with the full path?

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/tsdiscont - from package: opencaster

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