msva-query-agent: 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/msva-query-agent - from package: msva-perl

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

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