syrthes4_create_case: 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/syrthes4_create_case - from package: syrthes
/usr/lib/syrthes/bin/syrthes4_create_case - from package: syrthes

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

Error in other languages:
syrthes4_create_case: bevel nie gevind nie
syrthes4_create_case: comandă negăsită
syrthes4_create_case: comando não encontrado
syrthes4_create_case: commande introuvable
syrthes4_create_case: command not found
syrthes4_create_case: käsku ei ole
syrthes4_create_case: không tìm thấy lệnh
syrthes4_create_case: komanda nerasta
syrthes4_create_case: Kommando nicht gefunden.
syrthes4_create_case: kommandot finns inte
syrthes4_create_case: komut yok
syrthes4_create_case: nie znaleziono polecenia
syrthes4_create_case: níor aimsíodh an t-ordú
syrthes4_create_case: no se encontró la orden
syrthes4_create_case: no s'ha trobat l'ordre
syrthes4_create_case: opdracht niet gevonden
syrthes4_create_case: parancs nem található
syrthes4_create_case: perintah tidak ditemukan
syrthes4_create_case: príkaz nenájdený
syrthes4_create_case: příkaz nenalezen
syrthes4_create_case: команда не найдена
syrthes4_create_case: командата не е открита
syrthes4_create_case: 命令找不到
syrthes4_create_case: コマンドが見つかりません