xml2marc: 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/xml2marc - from package: libmarc-xml-perl

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

Error in other languages:
xml2marc: bevel nie gevind nie
xml2marc: comandă negăsită
xml2marc: comando não encontrado
xml2marc: commande introuvable
xml2marc: command not found
xml2marc: käsku ei ole
xml2marc: không tìm thấy lệnh
xml2marc: komanda nerasta
xml2marc: Kommando nicht gefunden.
xml2marc: kommandot finns inte
xml2marc: komut yok
xml2marc: nie znaleziono polecenia
xml2marc: níor aimsíodh an t-ordú
xml2marc: no se encontró la orden
xml2marc: no s'ha trobat l'ordre
xml2marc: opdracht niet gevonden
xml2marc: parancs nem található
xml2marc: perintah tidak ditemukan
xml2marc: príkaz nenájdený
xml2marc: příkaz nenalezen
xml2marc: команда не найдена
xml2marc: командата не е открита
xml2marc: 命令找不到
xml2marc: コマンドが見つかりません