DicomSRValidator: 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/DicomSRValidator - from package: pixelmed-apps

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

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