Hi Gazisohel,

A Payment Document Series needs to be created in the Payment Documents screen. First select “Customer Payment Receipt” from the drop-down at the top:

Then add a row, for example:

Save this. Then Right Mouse Button on the row to “Payment Document Number Series”

Add a row, for example:

Save.

Now you can return to the Mixed Payment and try approving again.

Thanks,

Chris

I sincerely appreciate your support in resolving the issue .