tcppm: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/tcppm - from package: 3proxy

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