Same Wage type - Arrears processing for one employee but not other

[Former Member]

Hi Experts

I have a deduction wage type (WT) in Infotype 0014 which I entered for 2 employees with dates Jan 1 to Dec 31,2017. This was entered after payroll processed for Pay period 01 and 02. Now Pay period 03 is retro calculating back to Pay period 01.2017.

In the pay slip, the WT has been correctly retro calculated for one employee but not the other. What might be the reason, considering it is the same wage type for both employees entered retroactively in a similar way? The employee for whom the retro calculation is not happening is a New hire. Could this have any impact?

I compared payroll logs for both employees and I see a difference in Function PRDNT processing in Pay period 01 retro calculation. For employee with wrong retro calculation, the wagetype appears in table DDNTK (input) and hence not transferred to ARRRS table (output) after function PRDNT completes processing.

But for the employee with correct retro results, the wagetype does not appear in DDNTK and so PRDNT does a calculation such that the wagetype is output in table ARRRS at the end of its processing and I'm guessing this is then passed on to the Pay period 03 current processing. Screen shot attached - screenshot-of-py-log.png

Can anyone help me understand how I can get retro processing to work in this situation or why there is a difference in retro processing between the 2 employees for the exact same wage type.

Thanks

Raechel