Balance in 1 currencies at the time of settlement of WBS to cost Centre

Hi,

while settling the WBS to cost centre I am getting this error in IDES for CO Code1000.

Balances have been found in 1 currencies with the following details:

Currency type Amount Currency

40 0.04 USD

(A maximum of three differences are listed)

Pl suggest what to check

Thank You.

Regards

Man