travelccm: 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/travelccm - from package: travelccm

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