tapecopy: 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/tapecopy - from package: hercules

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

On Debian possible default full paths are:

/usr/bin/tapecopy - from package: hercules

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

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