XTandemAdapter: 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/XTandemAdapter - from package: topp

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

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