Multi value error in bar chart

Hi,

I am getting the following error in bar chart for recp_id versus actual and budget.

"Formula Evaluation- Error in dataset: Multivalue check formula definition in this dataset context"

I have following report in the tab1, chart on tab2

Class, Eq No, Recp_Id, Status, hrs_used, hrs_avail, rate, Actual, Budget

2         123            R1      A         10        10              5      50     50

2          123           R1      A         _         20              5      0       100

1           234          R2      A         10        5               10    100    50

I have 3 data providers:

hrs_used Dp1: Eq No, hrs_used, compcode,recp_id

hrs_avail Dp2: Eq No, Eff_st_dt,Eff_end_dt,compcode, recp_id

master data Dp3: Eq No, compcode,status, Eq name, class

Merging on Eq No, compcode, recp_id

I was getting multi value error for hrs_avail, actual,budget and resolved it in the report using below formula for hrs_avail. I donot have any multi value error in the report

[Includingweekends]=Sum(DaysBetween([Eff_st_dt];RelativeDate([Eff_end_dt];1) )  ForEach([Eq No];[Recp_Id];[Eff_st_dt];[Eff_end_dt]))

hrs_avail=If([Prompt for Weekends]="N") Then ([Prompt for Available Hours] * [Excluding weekends]) Else ([Includingweekends] * [Prompt for Available Hours])

Actual=[hrs_used] * [rate]

Budget=[hrs_avail]* [rate]

Report output now:

Class, Eq No, Recp_Id, Status, hrs_used, hrs_avail, rate, Actual, Budget

2          123     R1               A         10        30        5          150     50

1          234     R2               A         10        5         10         100    50

I have an issue with the graph with multi value alert on the top of chart for recp_id versus actual and budget.