while creating drivetime polygons, the Network Analyst gave me the error above.
What does this mean?
I tried to reduce them to just 4 minutes and relocated every facility that wasn't traversable. But it didn't help.
300 minute service area in some parts of the country may fail on 2 GB machines.
Since you are running on a 64 bit environment with 6 GB, and if you are running ArcGIS 10.0,
then it will be able to use up to 4 GB. It should work with the chunking on.
I will suggest that you add a TRIM of 500 to 1000 meters otherwise the polygons will look like blobs.
The trim should add couple of extra minutes to each solve but results in much better looking polygons.
If it does not work then I will suggest that you run it as background GP process with Solve tool in the network analyst toolbox.
Make sure to have created the service area layer AFTER you add the registry keys as that will make that service area layer use the registry settings.