tcprobe: 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/tcprobe - from package: transcode

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

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