Summary of items with the same ISR Ref.? --> &

What causes this issue?

This message details a program control option.

System Response

In real estate management you want to pay all invoices that relate to a
contract together.
You need to be able to do this because for the business partner
(landlord of an object) the internal distribution of an invoice he has
issued for these various items is unknown, and consequently this
distribution should not have any effect on the payment.
The ISR payment method used in Switzerland, however, requires the
individual payment of invoices. This requirement has been met in the
payment program where invoices with the same ISR reference for a payment
are grouped, so that separate payments are only made where the ISR
numbers are different.
For each vendor, all items are grouped that have been posted to a real
estate contract with contract type '9' (real estate general contract),
that have the same due date (baseline payment date), and also the same
ISR reference and ISR number.
If a payment is to be made additionally separated according to
contracts, payment grouping has to be used for the vendors concerned.

How to fix this error?

If you assign this system message the active message type 'W', the items
detailed are grouped. If the message has a different type, no grouping
is made.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

INCLUDE CUSTOMIZED_MESSAGE_INFO OBJECT DOKU ID TX

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.