Remote Function Call (RFC) could not be carried out!

What causes this issue?

The Remote Function Call (RFC) for copying the account assignment
Customizing settings to the planning server (APO) could not be carried
out.
The system tried to connect with system &v1&.

System Response

The new settings were not copied. For this reason, the settings will
not be taken into account during account assignment.

How to fix this error?

Check the settings for the RFC destination to the planning server.
Check that the planning server is available (activated).
When the server is available again, call Customizing online again and
save the settings again.
If this message does not appear again, then the data has been copied
successfully to the planning server.

Error message extract from SAP system. Copyright SAP SE.