using ssrs 2008 winserver 2008
wrote a report that does commulative summing for each line :

Public Dim SumTotal As Double = 0
Public Dim SumVend As Double = 0
Public Function GetSumTotal(s As Double, v As Double) As Double
   If v <> SumVend
      SumVend = v
      SumTotal = 0
   End If

   If s<>0 Then
      SumTotal += s
      Return SumTotal
      Else : Return s
   End If
End Function

the report runs fine and returns correct data.

however when sent to print (physical printer, pdf, xps)  or viewed in the print preview,

the sum total doesnt get initliazed (me thinks) - instead of starting with the value of zero the sumtotal initial value is the result of the sumtotal as calculated when running the report on screen.

hence the open balance is wrong and the report data is completly messed up.
going back to screen it is perfectly fine.

completly lost on this,

roy