Error while submitting travel expense report

Dear All

I have created my travel request and got approved.

Now i have created travel expense and after entering receipts and clicking on send for approval it is showing the below error and i am unable to send for approval.

Entry not found in table T706U. Argument: BSP HK 20110425

Please help me out ,.

I have created an entry HK in the table T706U as it is showing that the entry is not found but still i am facing the same problem.

Can anybody please let me know the solution for it.

Thanks and Regards.