ltx2crossrefxml: 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/ltx2crossrefxml - from package: texlive-bibtex-extra

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

Error in other languages:
ltx2crossrefxml: bevel nie gevind nie
ltx2crossrefxml: comandă negăsită
ltx2crossrefxml: comando não encontrado
ltx2crossrefxml: commande introuvable
ltx2crossrefxml: command not found
ltx2crossrefxml: käsku ei ole
ltx2crossrefxml: không tìm thấy lệnh
ltx2crossrefxml: komanda nerasta
ltx2crossrefxml: Kommando nicht gefunden.
ltx2crossrefxml: kommandot finns inte
ltx2crossrefxml: komut yok
ltx2crossrefxml: nie znaleziono polecenia
ltx2crossrefxml: níor aimsíodh an t-ordú
ltx2crossrefxml: no se encontró la orden
ltx2crossrefxml: no s'ha trobat l'ordre
ltx2crossrefxml: opdracht niet gevonden
ltx2crossrefxml: parancs nem található
ltx2crossrefxml: perintah tidak ditemukan
ltx2crossrefxml: príkaz nenájdený
ltx2crossrefxml: příkaz nenalezen
ltx2crossrefxml: команда не найдена
ltx2crossrefxml: командата не е открита
ltx2crossrefxml: 命令找不到
ltx2crossrefxml: コマンドが見つかりません