wavmerge: 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/wavmerge - from package: wavbreaker

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

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