The Runtime Information register is where Rapidi keeps system and phase-related information. Rapidi uses RTI as a sort of reference book.
When you, for example, apply the feature "Source Control" (transferring only changed data), Rapidi will use RTI to store relevant Source Control information. Every time Rapidi needs the Source Control information, it will refer to the Runtime Information Register.
When running a transfer with Source Control enabled, an entry in RTI will be stored (created or updated) for the unique combination of (1) Transfer Code, (2) Source, and (3) Destination.
If you want to run a Transfer (that has Source Control enabled) and have it transfer some or all of the already transferred records, you can set back the value of the corresponding RTI entry here (e.g, you can reset it to 0 or any other timestamp):

Note: RTI will not be enabled for transfer where you are not using a source control, and therefore, the RTI section will not show any information related to that transfer.