vsd2text: 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

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/vsd2text - from package: libvisio-tools

You may install the required package with command apt-get install {package}
Error in other languages:
vsd2text: bevel nie gevind nie
vsd2text: comandă negăsită
vsd2text: comando não encontrado
vsd2text: commande introuvable
vsd2text: command not found
vsd2text: käsku ei ole
vsd2text: không tìm thấy lệnh
vsd2text: komanda nerasta
vsd2text: Kommando nicht gefunden.
vsd2text: kommandot finns inte
vsd2text: komut yok
vsd2text: nie znaleziono polecenia
vsd2text: níor aimsíodh an t-ordú
vsd2text: no se encontró la orden
vsd2text: no s'ha trobat l'ordre
vsd2text: opdracht niet gevonden
vsd2text: parancs nem található
vsd2text: perintah tidak ditemukan
vsd2text: príkaz nenájdený
vsd2text: příkaz nenalezen
vsd2text: команда не найдена
vsd2text: командата не е открита
vsd2text: 命令找不到
vsd2text: コマンドが見つかりません