No check can be carried out in SAP GTS during online check printing

What causes this issue?

This message is issued in the following circumstances:
<LS>SAP Global Trade Services</> (SAP GTS) cannot be reached during the
manual creation of a payment medium.
The check in SAP GTS could not be made due to missing or incorrect
settings in Customizing of SAP GTS (technical incompleteness).

System Response

The system responds according to the system message setting as follows:
Message type E:
The payment medium is not created.
Message type I or W:
The payment medium is created. The system writes an entry that can be
used for a subsequent check in SAP GTS with program RFBREAKDOWNGTS. Note
that irrespective of the message type, the creation of the payment
document is <ZH>not</> prevented.

How to fix this error?

If the system has not created the payment medium, call transaction FBZ5
or FCH7 to restart payment medium creation. The prerequisite for this is
that SAP GTS is available again, or that you have analyzed the reasons
for the technical incompleteness of the document in SAP GTS, and dealt
with them by making appropriate changes in SAP GTS Customizing.
If the system has created a payment medium, execute program
RFBREAKDOWNGTS to subsequently check the paid documents.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.