I would like to make line graphs dead-end by changing 0 to Nulls in Double fields. The following function returned -1, instead of Null (the function does correctly return 0 when I replace Null with 0). Is it possible to convert to Nulls or Blanks in Number fields?
IF [JTD_RemainingUnits]>0
THEN [_CurrentField_]
ELSE [_CurrentField_] = Null()
ENDIF