DicomImageBlackout: 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/DicomImageBlackout - from package: pixelmed-webstart-apps

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

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