crashing with memory error on debian commanline render

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I’ve got some problems with commandlinerender on debian,
it runs smooth a while and then rendering crashes with:

https://www.evernote.com/shard/s176/sh/9d3be33a-be5d-48be-b059-9a65981e5963/3c47a78a8860f6440970a1197f1522a1

Debian GNU/Linux 6.0.7 (squeeze)
2.6.32-5-amd64

anyone knows what to do??