wossoperation: 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/wossoperation - from package: emboss

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

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