scheme2js: 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 CentOS possible default full paths are:

/usr/bin/scheme2js - from package: scheme2js

You may install the required package with command yum install {package}

Error in other languages:
scheme2js: bevel nie gevind nie
scheme2js: comandă negăsită
scheme2js: comando não encontrado
scheme2js: commande introuvable
scheme2js: command not found
scheme2js: käsku ei ole
scheme2js: không tìm thấy lệnh
scheme2js: komanda nerasta
scheme2js: Kommando nicht gefunden.
scheme2js: kommandot finns inte
scheme2js: komut yok
scheme2js: nie znaleziono polecenia
scheme2js: níor aimsíodh an t-ordú
scheme2js: no se encontró la orden
scheme2js: no s'ha trobat l'ordre
scheme2js: opdracht niet gevonden
scheme2js: parancs nem található
scheme2js: perintah tidak ditemukan
scheme2js: príkaz nenájdený
scheme2js: příkaz nenalezen
scheme2js: команда не найдена
scheme2js: командата не е открита
scheme2js: 命令找不到
scheme2js: コマンドが見つかりません