Houdini freezes whole system

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i just simply want to combine volume light with gilight for nice light scattering result.
result, as expected, is really nice, but there is some kind of error in houdini debugging console:
"mantra: Light
The light appears to compute illumination using
photon maps. This light is ignored for photon map generation.
mantra: VEX error: Point cloud handle referenced before it was opened. Was pcopen() called?
mantra: Aborting photon generation from light /obj/volumelight1 due to an extremely low photon storage ratio. Try moving lights closer to your scene.
mantra: Warning: attempt to set global property (renderer:rayquality) in the wrong state
mantra: Warning: attempt to set global property (renderer:rayquality) in the wrong state
mantra: Light
The light appears to compute illumination using
photon maps. This light is ignored for photon map generation.
mantra: VEX error: Point cloud handle referenced before it was opened. Was pcopen() called?
mantra: Aborting photon generation from light /obj/volumelight1 due to an extremely low photon storage ratio. Try moving lights closer to your scene.
mantra: Warning: attempt to set global property (renderer:rayquality) in the wrong state
mantra: Warning: attempt to set global property (renderer:rayquality) in the wrong state
"
it works like 50/50 - some times it renders properly, but some times whole system just became frozen.
i can only move my lagging mouse pointer - nothing works.
scenefile - https://www.dropbox.com/s/sf229d3jay34ygo/fire_bug.hipnc [dropbox.com]
also you can watch what kind of effect im talking about - http://clip2net.com/s/5gEG1Y [clip2net.com]
this is only test result, but i cannot continue my tests just because of too frequent crashes.

Attachments:
fire_bug.hipnc (1.4 MB)

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anyone?
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It sounds like you're running out of memory and the OS is starting to swap to disk. How much memory do you have installed?
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ive got 16 gb's of RAM and not even 1 gb is used when rendering this scene.
in error logs its asking to check if there any pcclose or something like that.
can it go for infinite loop or something?
i dont really know anything about that kind of stuff.
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When rendering, at frame 43 something happens and the ram usage goes crazy - from a few GB to 20GB!

Os X, Houdini 12.5.442
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well its a definitely a bug
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How to log bugs
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=25347 [sidefx.com]
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