RNPxlXICFilter: 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 Debian possible default full paths are:

/usr/bin/RNPxlXICFilter - from package: topp

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

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