Hi Shajish,
WT /416 is the total of WT /410 and /411. Since /416 & /410 is same that means no payment has been made through Irregular Income WT.
/411 is derived from WT /124, which stores monthly regular income. /411 comes from all 12 months of actual and projected values of /124.
So there has been some payment which has been hit /124 in the month of may. Please check all WT which are cumulated for /124 in V_512W_D. For checking you can also use the report RPDLGA20 to see all the WT added in reg income at one go.
Regards,
Prateek Varshney.