LUA low no memory

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Once in a while I get a LUA is running low on memory alert.

is there a way to allocated more memory to LUA or is there an addon that can tell me which addon it is that is causing this.

my addon's staty the same - I just update them to the latest when they are released thats why I suspect it's an update to an addon

I would be grateful for any help

the PC I use has 10 gig of RAM (and it's not maxed out when i see that warning) it's running at a healthy 55% of RAM

Thanks
-d