wcsware: command not found

Have You tried accessing the binary with the full path?

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/wcsware - from package: wcslib-tools

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