jocamldep.opt: 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/jocamldep.opt - from package: jocaml

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