| Exception | Description | 
|---|---|
| NoItemException | Thrown to indicate that an item is not available from a request or search. | 
| ServiceException | Thrown to indicate a service has failed. | 
| WWAbsentRequirementException | |
| WWRuntimeException | |
| WWTimeoutException | Thrown when a World Wind operation times out. | 
| WWUnrecognizedException | Indicates that a value, request or other item or action is not recognized. |