This article explains how to fix the issue with the bank file header.

Solution

What do you need to do to solve the problem:

1. Open the bank file via Notepad.
   

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2. On the second row find the text that looks like this below and delete it.
   <Document xmlns="http://www.six-interbank-clearing.com/de/pain.001.001.03.ch.02.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.six-interbank-clearing.com/de/pain.001.001.03.ch.02.xsd pain.001.001.03.ch.02.xsd">

   

3. Insert the below text into the same place and save the file
   <Document xmlns="urn:iso:std:iso:20022:tech:xsd:pain.001.001.03" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   

   

How the end file looks when opened via browser

If you open the file before any changes, you'll see that it has a wrong header

<Document xmlns="http://www.six-interbank-clearing.com/de/pain.001.001.03.ch.02.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.six-interbank-clearing.com/de/pain.001.001.03.ch.02.xsd pain.001.001.03.ch.02.xsd">

After you've updated the file, the file will have the correct header

<Document xmlns="urn:iso:std:iso:20022:tech:xsd:pain.001.001.03" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">