wmcdplay: 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/wmcdplay - from package: wmcdplay

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

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