pathfinderTree: 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/pathfinderTree - from package: cjdns-tools

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

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