I'm using Architecture 2011 trial and it generates good rendering, but after adjusting sun angle (time), I received a message: Make sure the destination directory is writable and that the disk is not full. Rendering aborted. Now I can't get renderings at all. Please advise. Thanks.
I ran across this problem as well using a registered version of Autocad 2013, so obviously it hasn't been resolved yet. Nothing special or out of the ordinary was going on (for me I did not have the Sun on at all), it just popped up, and I could not get around it.
I was not able to find any real solutions, but I did run across a post suggesting to cut and pasted everything into a new dwg. This worked for me but again, it's not a real solution.
Enter Render Presets Manager (Type: RENDERPRE )
Go to Render Size and click More Output Settings.
Under Save Image, tick Automatically save rendered image and then choose the location.
BC, AutoCAD2020