true, the procedure raises an error:
Invalid packaged application ID passed.
The installed packaged application is unlocked and cannot be upgraded.
The installed packaged application is up to date and no upgrade needed.
Syntax
APEX_PKG_APP_INSTALL.UPGRADE(
    p_app_name in varchar2 );
Parameters
Table 25-6 UPGRADE Procedure Signature 2 Parameters
| Parameter | Description | 
|---|---|
| 
 | The case insensitive packaged application name. | 
Example
The following example shows how to use UPGRADE procedure to upgrade packaged application ‘Bug Tracking' in DEMO workspace.
begin
    APEX_UTIL.SET_WORKSPACE( 'DEMO' );
    APEX_PKG_APP_INSTALL.UPGRADE( 
        p_app_name => 'Bug Tracking' );
end;
Parent topic: APEX_PKG_APP_INSTALL