camlp4oof: 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/camlp4oof - from package: ocaml-camlp4-devel

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

On Debian possible default full paths are:

/usr/bin/camlp4oof - from package: camlp4-extra

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

Error in other languages:
camlp4oof: bevel nie gevind nie
camlp4oof: comandă negăsită
camlp4oof: comando não encontrado
camlp4oof: commande introuvable
camlp4oof: command not found
camlp4oof: käsku ei ole
camlp4oof: không tìm thấy lệnh
camlp4oof: komanda nerasta
camlp4oof: Kommando nicht gefunden.
camlp4oof: kommandot finns inte
camlp4oof: komut yok
camlp4oof: nie znaleziono polecenia
camlp4oof: níor aimsíodh an t-ordú
camlp4oof: no se encontró la orden
camlp4oof: no s'ha trobat l'ordre
camlp4oof: opdracht niet gevonden
camlp4oof: parancs nem található
camlp4oof: perintah tidak ditemukan
camlp4oof: príkaz nenájdený
camlp4oof: příkaz nenalezen
camlp4oof: команда не найдена
camlp4oof: командата не е открита
camlp4oof: 命令找不到
camlp4oof: コマンドが見つかりません