fibxform: 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/lib/cmtk/bin/fibxform - from package: cmtk

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

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