isochore: 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/isochore - from package: emboss

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

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