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

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

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