Access to a stored directory not possible in this environment

What causes this issue?

A logical path has been entered as a directory. Access from the current
application server to the physical directory &v4& determined in
transaction FILE for the application server operating system is not
possible.

System Response

Operating system confirmation when OPEN on a test file in the directory
determined:
&v3&

How to fix this error?

You must check the physical directory defined in <DS:TRAN.FILE>FILE</>
for the logical path '&v1&' and the operating system '&v2&'. You should
check the following:
the name of the directory entered
the access authorization at operating system level
access to the directory in the network
This test is only relevant for the current operating system. If IDoc
processing runs in a differnent hardware environment, it can lead to a
different result.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.