No physical file name can be determined for &

What causes this issue?

You have specified a logical file name to which no physical file name
has been assigned.

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?

Either correct the entry or assign a physical file name to the logical
file name. To do this, go into Customizing and select
<LS>Basis</> -> <LS>File names</> -> <LS>Logical
file</>.

Error message extract from SAP system. Copyright SAP SE.