Favorites set up (parameter '&', root folder '&')

What causes this issue?

To use the favorites, they must be set up before the first access.
Certain administrative information is stored in this one-off operation.
To display this information, choose <ls>System -> User defaults -> Own
data</> (tab page Parameters).
This usually happens automatically - either when the favorites are
first used or later on, if the system realizes that existing favorites
can no longer be accessed.

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?

It is possible to have several, independent folder structures with
favorites, and switch between them. For this, choose <ls>Set
up/organize favorites </>.
If the favorites can no longer be displayed, for example because of an
unintentional change to the (internal) administrative entry in the user
parameters, and therefore are to be set up again automatically when
next used, this problem can also be solved using the function <ls>Set
up/organize favorites</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.