Mass import not possible if individual requests are selected

What causes this issue?

You have selected one or several requests. For security reasons, the
function <LS>Import all requests</> is rejected since this will import
all the requests in the queue.

System Response

The import is not started.

How to fix this error?

If you want to use the function <LS>Import all requests</>, you may not
select any requests in the import queue, or position the cursor on a
request.
To import the selected requests :
Select all the requests you want to import. To do this, choose<LS> Edit
-> Select -> Select block </> or select the requests individually by
choosing<LS> Edit -> Select -> Select request +/-.</>
Start the import by choosing <LS>Edit -> Import request.</>

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.