-24915: ERR_NOADDD - configuration update not allowed (param file is inactive) 

Explanation:

The database configuration cannot be changed as changes were made to the parameter file, but these changes are not yet activated.

User Action:

To activate the changes to the parameter file, change the database state to OFFLINE and then to WARM.

To discard the changes to the parameter file, use the DBMServer statement param_restore .