paginated report- Query correction

Hi All,

I am using below query to create a report a paginated report.

DEFINE
VAR BeginDate = DATEVALUE( 'ContractData'[SNAPSHOT_BEGIN_DATE])
VAR EndDate = DATEVALUE( 'ContractData'[SNAPSHOT_END_DATE])
VAR DateFilter=
FILTER(
KEEPFILTERS(VALUES(@Date)),
AND( @Date >= BeginDate, @Date <= EndDate))

EVALUATE SUMMARIZECOLUMNS('ContractData'[ACCOUNT], 'ContractData'[Due Date], RSCustomDaxFilter(@ContractDataCONAME,EqualToCondition,[ContractData].[CO_NAME],String),
DateFilter)

When i validate above query getting "no parameter match for multivalue placeholder"

Could you please help to resolve this issue.

thank you in advance