I've never seen this before but I've had a 'low memory' message yesterday. I've just spent an hour cleaning up my config - deleted all the unused/unconnected bits of code I'd got in there (things I'd superseded but kept in case I wanted to revert), a load of VI's I'd set up and not used, updated the last few lighting blocks
But I just got the message again. I don't think my config is large or complex compared to many peoples - it's a smallish 3 bed house.
The Minserver in Config shows as 7% utilisation - that's CPU/System memory isn't it?
Any thoughts?