Hi Darren,
I am using the file>>save as dialog that you have described. I emptied my temp folder, and also tried a new temp folder.
However, after all that I've determined that my problem is not due to Labview, but is due to something that is happening between Windows2000 and my hard drive.
Without intending to turn this into a Microsoft Developer Exchange, the symptoms I'm seeing are this:
In the directory where I am storing my Labview files (c:\labview) I can save VIs, but not libraries. Also I can create a new folder, but not rename or delete folders, and I also can't delete any files.
I have defragged the drive, and tried running scan disk, but with the "Automatically fix file system errors" checkbox selected, the scan doesn't run because
"exclusive access to the drive could not be obtained." I am logged in as administrator.
The problem sprung up suddenly. For now, I've gotten around it by creating a new directory to hold my Labview files. Getting scan disk to run might fix the problem, or at least let me know the cause.