gpicslice: 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

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/share/doc/whizzytex/examples/bin/gpicslice - from package: whizzytex

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