When creating a Incremental or differential backup after loading it's precreated selection saveset that was used upon it's associated full the Inc and diff options are unable to be selected. You are left with a full backup option only. Modifications do not allow you to change it.
This outcome was caused from point in time recovery configuration options not completed. Enable Point in Time Recovery - Used to enable Point in Time (PIT) backups and restores. As the name implies, this allows you to perform a recovery up to a point prior to and/or after data corruption occurs. Select this option if Point-in-Time Recovery will be allowed for this MySQL instance. This functionality requires that you enable the MySQL Binary Log.
Binary Log Index Path - This field works in conjunction with the Enable Point in Time Recovery option. Once that option has been enabled, use this field to specify the complete path to the Binary Log Index file name (including the directory and file name). With a default installation of MySQL, this file can be found as follows (based on operating system):
The First step is enabling the binary log upon the MySQL Server. Prior to configuring support for PIT backups/restores, the MySQL “Binary Log” must be enabled. See the relevant section below, based on the O/S installed/used on your MySQL Server.
Linux based MySQL server.
1. Access the MySQL installation directory, and locate the MySQL configuration file, which is entitled, “my.cnf”.
2. Open the file for editing (i.e., in a suitable text-editing application).
3. Locate the “[mysqld]” section of the file and add the following entry, in order to use the default MySQL directory to house the MySQL Binary Log:
log-bin
4. Restart the MySQl Server in order to enable the changes.
Windows based MySQl server.
1. Launch the MySQL Administrator application (for details on accessing this application, please see the relevant MySQL documentation).
2. In the window that launches, click on the Startup Variables item in the left-hand column.
3. In the right column, click on the Log Files tab.
4. Locate the Binary Logfile Name entry and click in its checkbox to activate its associated field. Either input a unique name value for the Binary Log File in the field that is activated, or leave the field blank to use the default value of “log-bin”.
The next step is to check the "Enable Point in Time Recovery check box within the MySQL APM configuration. Then fill in the complete path to the Binary Log file name within the "Binary Log Index Path" section.
Once these configurations steps above are in place you will now be able to select the Incremental and or differential options within the MySQL APM Backup Options tab.
