simulavr-vcd: 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/simulavr-vcd - from package: simulavr

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