AR Invoice Import, DTW Error - Exchange rate not Updated

HI Experts,

I am trying to Import A/R Invoice through DTW and getting the following error

"Exchange rate not Updated ,'USD' Application ....."

I am using minimum data and a sample given below

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RecordKey DocEntry CardCode DiscountPercent DocCurrency DocDate DocDueDate DocNum DocType DocumentSubType

RecordKey DocEntry CardCode DiscountPercent DocCurrency DocDate DocDueDate DocNum DocType DocumentSubType

1 CU00001 0 INR 20090104 20090104 5656006 I --

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Company is having Local currency INR, System Currency USD and Default account currency is INR.

I updated the exchange rate for all available currencies for the past four months, including closing month of last Fin year.

Please advice

Thanks and regards

Ajith G