htcopy: 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/htcopy - from package: lcgdm-dav

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

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