rec2csv: 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/bin/rec2csv - from package: recutils

You may install the required package with command apt-get install {package}
Error in other languages:
rec2csv: bevel nie gevind nie
rec2csv: comandă negăsită
rec2csv: comando não encontrado
rec2csv: commande introuvable
rec2csv: command not found
rec2csv: käsku ei ole
rec2csv: không tìm thấy lệnh
rec2csv: komanda nerasta
rec2csv: Kommando nicht gefunden.
rec2csv: kommandot finns inte
rec2csv: komut yok
rec2csv: nie znaleziono polecenia
rec2csv: níor aimsíodh an t-ordú
rec2csv: no se encontró la orden
rec2csv: no s'ha trobat l'ordre
rec2csv: opdracht niet gevonden
rec2csv: parancs nem található
rec2csv: perintah tidak ditemukan
rec2csv: príkaz nenájdený
rec2csv: příkaz nenalezen
rec2csv: команда не найдена
rec2csv: командата не е открита
rec2csv: 命令找不到
rec2csv: コマンドが見つかりません