dtsdec: 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/dtsdec - from package: libdca-utils

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