How to correct the segment count in the payment file after adding a dff line

Summary:

We added a DFF for additional information in the invoice. The users want this line to be populated in the payment file. We have successfully added the DFF and the line. However, the segment count (line count) in the payment file is not correct.

Content (required):

The issue with our testing using this logic, there are multiple invoice per bulk payment and the additional line is not being pulled correctly.

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Code Snippet (add any code snippets that support your topic, if applicable):