ArcGIS Engine Developer Guide

APPLICATION DEVELOPMENT AND LICENSE INITIALIZATION
• If the application was initialized with a license server and the extension
functionality is not necessary for the application to function, the extensions
can either be checked out directly after the application is initialized or checked
out as the extension functionality is required. When the extension is checked
in, the functionality should be disabled.
Step 5: Shutdown
Before an application is shut down, the AoInitialize object must be shut down.
This ensures that any ESRI libraries that have been used are unloaded.
WHY DOES INITIALIZATION FAIL?
If a product or extension fails to check out, the license status indicates the reason
for the failure. Licenses can fail to check out for the following reasons:
• A product is not licensed.
• A license is unavailable because it is already being used (Desktop Concurrent
licenses only).
• An unexpected license failure due to system administration problems.
• The license is already initialized. An application is initialized with a product
license for the duration of its life. It is possible to check with which product
license an application has been initialized. For example, if an application
containing some enterprise geodatabase editing has been initialized with an
Engine Single Use with Geodatabase Update extension or an ArcEditor or
ArcInfo license, the editing functionality can be enabled. If, however, the
application has been initialized with an Engine Single Use or ArcView license,
the editing functionality must be disabled.
264 • ArcGIS Engine Developer Guide