NiCRead: 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/NiCRead - from package: openni-examples

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

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