Free the space used by the currently loaded catalog.
First available in version 3.0 build 2039.
No output parameters.
When this method is called synchronously, a return object containing the output parameters is returned to the caller immediately.
The loaded catalog will automatically be removed when your application ends or when a new table is loaded. The only time you need to call Catalog.unload explicitly is when you want to free the memory used by a large table.
No searches can be performed and the results of the last search will not be available after calling Catalog.unload.