wildmidi: 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/wildmidi - from package: wildmidi

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

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