dsr2html: 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/dsr2html - from package: dcmtk

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

Error in other languages:
dsr2html: bevel nie gevind nie
dsr2html: comandă negăsită
dsr2html: comando não encontrado
dsr2html: commande introuvable
dsr2html: command not found
dsr2html: käsku ei ole
dsr2html: không tìm thấy lệnh
dsr2html: komanda nerasta
dsr2html: Kommando nicht gefunden.
dsr2html: kommandot finns inte
dsr2html: komut yok
dsr2html: nie znaleziono polecenia
dsr2html: níor aimsíodh an t-ordú
dsr2html: no se encontró la orden
dsr2html: no s'ha trobat l'ordre
dsr2html: opdracht niet gevonden
dsr2html: parancs nem található
dsr2html: perintah tidak ditemukan
dsr2html: príkaz nenájdený
dsr2html: příkaz nenalezen
dsr2html: команда не найдена
dsr2html: командата не е открита
dsr2html: 命令找不到
dsr2html: コマンドが見つかりません