dispcalGUI-VRML-to-X3D-converter: 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/dispcalGUI-VRML-to-X3D-converter - from package: dispcalgui

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

Error in other languages:
dispcalGUI-VRML-to-X3D-converter: bevel nie gevind nie
dispcalGUI-VRML-to-X3D-converter: comandă negăsită
dispcalGUI-VRML-to-X3D-converter: comando não encontrado
dispcalGUI-VRML-to-X3D-converter: commande introuvable
dispcalGUI-VRML-to-X3D-converter: command not found
dispcalGUI-VRML-to-X3D-converter: käsku ei ole
dispcalGUI-VRML-to-X3D-converter: không tìm thấy lệnh
dispcalGUI-VRML-to-X3D-converter: komanda nerasta
dispcalGUI-VRML-to-X3D-converter: Kommando nicht gefunden.
dispcalGUI-VRML-to-X3D-converter: kommandot finns inte
dispcalGUI-VRML-to-X3D-converter: komut yok
dispcalGUI-VRML-to-X3D-converter: nie znaleziono polecenia
dispcalGUI-VRML-to-X3D-converter: níor aimsíodh an t-ordú
dispcalGUI-VRML-to-X3D-converter: no se encontró la orden
dispcalGUI-VRML-to-X3D-converter: no s'ha trobat l'ordre
dispcalGUI-VRML-to-X3D-converter: opdracht niet gevonden
dispcalGUI-VRML-to-X3D-converter: parancs nem található
dispcalGUI-VRML-to-X3D-converter: perintah tidak ditemukan
dispcalGUI-VRML-to-X3D-converter: príkaz nenájdený
dispcalGUI-VRML-to-X3D-converter: příkaz nenalezen
dispcalGUI-VRML-to-X3D-converter: команда не найдена
dispcalGUI-VRML-to-X3D-converter: командата не е открита
dispcalGUI-VRML-to-X3D-converter: 命令找不到
dispcalGUI-VRML-to-X3D-converter: コマンドが見つかりません