The operation cannot be carried out with this node type

What causes this issue?

Node types such as logical system, inbound and outbound IDocs or filter
nodes are used only for the structure and for information. They cannot
be used for processing and display functions.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.