vr.pl: command not found

Have You tried accessing the binary with the full path?

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/share/sql-ledger/bin/lynx/vr.pl - from package: sql-ledger
/usr/share/sql-ledger/bin/mozilla/vr.pl - from package: sql-ledger

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