Each infotype requires a dialog module that represents the interface between the transactions used within Human Resource Management and the infotype itself. The name of the dialog module must be
RP_nnnn , where nnnn stands for the number of the infotype.The dialog module is assigned to an infotype when the dialog module is maintained. You must specify the name of the module pool and the number of the initial screen for the infotype.
The infotype is assigned to the dialog module in table T582A or by the name of the dialog module.

Infotype 0002 Personal Data uses module pool