When you work offline, AutoCAD Map 3D toolset caches all your feature data connections.
To work offline
For more information, see Checking Out Features.
You can still check out and edit features while you are offline. When you return online, AutoCAD Map 3D toolset attempts to lock features that you checked out while you were offline. Non-feature data cannot be checked out, so you cannot edit it unless you are connected to its source.
To return online
For more information, see Checking In Features.
To clear the cache
Optionally, at the Command prompt, enter mapoptions.
To rebuild the cache