[Pharo-users] pharo headless and without gui. Seaside app

I need to run pharo headless and without gui for a Seaside app i am working on. I user pharo -vm-display-null --headless imagefile and does not work. May be someone can help me. TIA Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 San Miguel de Tucumán Email: pdigonzelli@softsargentina.com pdigonzelli@gmail.com Cel: 5493815982714