Message type: E = Error
Message class: S3 - Transaction for processing logical databases
Message number: 021
Message text: Selection screen & for logical database & already exists
You entered a selection screen number that already exists.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Specify a different number. Select <LS>F4=Possible entries</> to
display a list of existing numbers.
Error message extract from SAP system. Copyright SAP SE.
S3020 Selection screen & for logical database & does not exist
What causes this issue? You entered a selection screen number which does not ex...
S3019 Saving not necessary (no changes made)
Self-Explanatory Message Since SAP believes that this specific error message is ...
S3022 No selection screens exist for logical database &
What causes this issue? The logical database has only the automatically generat...
S3023 Logical database & created as a copy of &
Self-Explanatory Message Since SAP believes that this specific error message is ...
SAP messages fall into 3 different categories: Error messages
(message type = E), Warnings (W) or Informational (I) messages.
An error message will prevent you from continuing your work - it is a hard stop and you need to fix the error before you can proceed. A warning message will stop your work, however, you can then bypass the warning by pressing the Enter key on your keyboard. That said, it is still good practice to investigate the cause of the warning message and address it. An information message will not stop your work and is truly just for informational purposes.
Click on this link to search all SAP messages.