Enter a table that has a flat structure

What causes this issue?

The table does not have a flat structure.

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?

You can only display tables with a flat structure in a table control.
Check to see whether or not the table contains <ZH>other tables,
references, or strings.</>
If it does, you cannot use the table.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.