LR2 says Drive C space low, needs 20 MB. C has 428 GB free.

[D Ben]

Message from LR2:  Your disk "Local Disk (C:)", which contains your Lightroom catalog, is critically low on space.
Lightroom has saved the contents of your catalog.  You must now remove files or empty the trash to make at least 20 MB available or quit Lightroom.

Win 7 HP, 64-bit, 8 GB.  Drive C has 428 GB available out of 931 GB.

Any suggestions would be appreciated.  Thanks in advance.

[Jim Pascoe]

Hi

You will probably want to wait until one of the more computer literate forum members answers your question.  However is it possible that your disc is partitioned, and that the Lightroom catalogue is in a partition that is almost full?

Good luck!

Jim

[wolfnowl]

Are you allocating an inordinate amount of virtual memory of swap file space to the C: drive that would make Lightroom think the disk is full?

Mike.

[jtmiller]

I saw the same message on Vista64 the other day. We have over 500G freespace on C:. I assumed that something had leaked memory and decided to reboot. No problems since.

jtm

[MartinRobson]

This seems to be quite a common problem (see http://forums.adobe.com/thread/660842?tstart=0 )
I suspect it may have something to do with the size of the cache LR uses to generate previews - This would tie in with the message occuring when the computer has been idle.