Error Message no. F5702 'Balance in transaction currency'

I am running the debit position run in Loans Management transaction code FNM1S. I am getting the following error message as follows;

Balance in transaction currency

Message no. F5702

Diagnosis

A balance has occurred in transaction currency 'ZMK' with the following details:

Exchange rate '00', amount ' 400,000.00-' and currency key 'ZMK'.

The data in the transaction currency were transferred from the calling application.

System Response

Your data cannot be processed in FI.

Procedure

The error is probably in the calling application.

I am using SAP ECC 6.0 version.

Thanks in advance

Tari.