tcscan: 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/tcscan - from package: transcode

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

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