dcm2pdf: 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/dcm2pdf - from package: dcmtk

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

Error in other languages:
dcm2pdf: bevel nie gevind nie
dcm2pdf: comandă negăsită
dcm2pdf: comando não encontrado
dcm2pdf: commande introuvable
dcm2pdf: command not found
dcm2pdf: käsku ei ole
dcm2pdf: không tìm thấy lệnh
dcm2pdf: komanda nerasta
dcm2pdf: Kommando nicht gefunden.
dcm2pdf: kommandot finns inte
dcm2pdf: komut yok
dcm2pdf: nie znaleziono polecenia
dcm2pdf: níor aimsíodh an t-ordú
dcm2pdf: no se encontró la orden
dcm2pdf: no s'ha trobat l'ordre
dcm2pdf: opdracht niet gevonden
dcm2pdf: parancs nem található
dcm2pdf: perintah tidak ditemukan
dcm2pdf: príkaz nenájdený
dcm2pdf: příkaz nenalezen
dcm2pdf: команда не найдена
dcm2pdf: командата не е открита
dcm2pdf: 命令找不到
dcm2pdf: コマンドが見つかりません