send_study: 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 Debian possible default full paths are:

/usr/bin/send_study - from package: ctn

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

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