The MT940 and camt.053 export formats require a starting balance.
(you can access our main page here: https://ckonverter.de/ )

This can often be read out. If this is not possible (you will see the message here after you have uploaded your file for conversion for the first time), please enter the starting balance manually.

If you do not enter anything and no balance can be read out, the opening balance is set to 0.00 euros.

When entering, please enter two decimal places after the decimal point.