RenderingCxxTests: 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/RenderingCxxTests - from package: vtk-testing

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

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