I've seen this a few times, both with Poser 7 and 8 - when Poser.exe crashes and firefly.exe still seems to be alive. I've never actually had a render come out of it even with waiting, my patience has always run out before anything MIGHT happen... 

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.