rotextract: command not found

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/rotextract - from package: esys-particle

You may install the required package with command apt-get install {package}

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