snmpsim-datafile: 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/snmpsim-datafile - from package: snmpsim

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