Sap Webi Universe formula to calculate the total number of re-admission patients within 14 days

[Raz11]

Hi Experts,

I want a Sap Webi Universe formula to calculate the total number of re-admission patients with the same diagnosis within 14 days of discharge.

Note: I don't have specific diagnosis. I have admit date, discharge date

I try these formulas, but I receive an error:

1) =Sum(If [Diagnosis Description] = Next([Diagnosis Description]; [MRN- Organization]) And
(Next([Admit Date & Time]; [MRN- Organization]) - [Discharge Date & Time]) <= 14 Then 1 Else 0)

2) =If ([Diagnosis Description] = [Diagnosis Description] ForEach ([MRN- Organization]))
And (DatesBetween([Admit Date & Time]; [Discharge Date & Time]) <= 14) Then "Readmission within 14 days"
Else "Not Readmitted"

Regards.