vsd2raw: 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/vsd2raw - from package: libvisio-tools

You may install the required package with command apt-get install {package}
Error in other languages:
vsd2raw: bevel nie gevind nie
vsd2raw: comandă negăsită
vsd2raw: comando não encontrado
vsd2raw: commande introuvable
vsd2raw: command not found
vsd2raw: käsku ei ole
vsd2raw: không tìm thấy lệnh
vsd2raw: komanda nerasta
vsd2raw: Kommando nicht gefunden.
vsd2raw: kommandot finns inte
vsd2raw: komut yok
vsd2raw: nie znaleziono polecenia
vsd2raw: níor aimsíodh an t-ordú
vsd2raw: no se encontró la orden
vsd2raw: no s'ha trobat l'ordre
vsd2raw: opdracht niet gevonden
vsd2raw: parancs nem található
vsd2raw: perintah tidak ditemukan
vsd2raw: príkaz nenájdený
vsd2raw: příkaz nenalezen
vsd2raw: команда не найдена
vsd2raw: командата не е открита
vsd2raw: 命令找不到
vsd2raw: コマンドが見つかりません