symplx: 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/lib/cmtk/bin/symplx - from package: cmtk

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

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