No link maintained to target system &2

What causes this issue?

The distribution model does not include a link to required target
system(s) &V2&.

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?

Check that the correct target system has been selected, or inform your
system administrator.

Procedure for System Administrators

Check the distribution model. Has target system &V2& been entered? Has
object &V3& been entered with method &V4& for the link from &V1& to
&V2&?

Error message extract from SAP system. Copyright SAP SE.