Field help (MVTDAT1) 

This help is common to the single and mass transfer processings.

This is the date at which the transfer is recorded. This date is mandatory and displayed in the EVTDAT field for the corresponding FASAFFAGE (assets) and PHTAFFGEO (physical elements) event(s).
It must be later or equal to:

In the case of a mass transfer cancellation, it is the date at which the transfer to be canceled has been carried out.