obex_tcp: 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/obex_tcp - from package: openobex-apps

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

On Debian possible default full paths are:

/usr/bin/obex_tcp - from package: openobex-apps

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

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