datacopy: 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/datacopy - from package: freetds

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

On Debian possible default full paths are:

/usr/bin/datacopy - from package: freetds-bin

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

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