Hi Ben, What OS are you on and what version of csound? I have seen problems before on Windows when FLTK is compiled with either threads enabled or not (can't remember which one). steven On 8/14/07, Ben McAllister wrote: > Hi Folks - > > I have an orc which uses the FLTK widgets - it renders and plays fine when > used with an external MIDI controller. However, rendering breaks down when > I run it with Steven's Virtual MIDI Keyboard - the keyboard renders and > plays fine, but my gui fails to render. I get a window appropriately named, > but no contents are painted within. Has anyone run into this situation? > > Thanks - > Ben McAllister > Current Projects: http://www.listenfaster.com http://www.wizardprison.com > http://www.myspace.com/cmoncmonband