How to specify group in RunningValue function in SQL Server Reporting Services? -


i have data set following fields:

serialnumber, dateofpayment, paymentamount, sourcecode , campaign.

my data has 2 campaign types, bs12 , bs13.

i'm trying plot running total of payment amount campaign. in chart have following expression y value:

=runningvalue(fields!paymentamount.value, sum, "campaign")

however, keep getting error:

the y expression chart 'chart1' has scope parameter not valid runningvalue, rownumber of previous. scope parameter must set string constant equal name of containing group within tablix 'chart1'.

i've looked multiple sources , feel doing right thing, campaign field in tablix , have entered string. why error occurring? - can me?

it's complaining scope parameter: "campaign". rather pass column name function, need define group (if there not 1 already) on column in chart , pass name of group instead. example here.


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