mpd-sima: 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/mpd-sima - from package: mpd-sima

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

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