jcasgen: 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/jcasgen - from package: uima-utils

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