ovp2ovf: 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/ovp2ovf - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/ovp2ovf - from package: texlive-binaries

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

Error in other languages:
ovp2ovf: bevel nie gevind nie
ovp2ovf: comandă negăsită
ovp2ovf: comando não encontrado
ovp2ovf: commande introuvable
ovp2ovf: command not found
ovp2ovf: käsku ei ole
ovp2ovf: không tìm thấy lệnh
ovp2ovf: komanda nerasta
ovp2ovf: Kommando nicht gefunden.
ovp2ovf: kommandot finns inte
ovp2ovf: komut yok
ovp2ovf: nie znaleziono polecenia
ovp2ovf: níor aimsíodh an t-ordú
ovp2ovf: no se encontró la orden
ovp2ovf: no s'ha trobat l'ordre
ovp2ovf: opdracht niet gevonden
ovp2ovf: parancs nem található
ovp2ovf: perintah tidak ditemukan
ovp2ovf: príkaz nenájdený
ovp2ovf: příkaz nenalezen
ovp2ovf: команда не найдена
ovp2ovf: командата не е открита
ovp2ovf: 命令找不到
ovp2ovf: コマンドが見つかりません