Well I discovered that my restarting my machine caused Poser to corrupt several files on the drive I keep my runtimes on. I've had to scan disk twice to correct and delete all the damaged files. I know about the ctrl:alt:del, but hitting the esc button is new to me, I think I'll try that next time it happens, 'cos you know it will happen again. lol 8) P5 has only done this to me when using the firefly renderer before and this is the first time it's happened when using the P4 renderer. Actually when I try to make an image say at 4000x3000 with firefly it always crashes and if I want an image rendered at this size I've usually alway got to use the P4. Does anyone know why firefly has such problems with this? Thanks 8) Catlin