Error when generating the report (see long text)

What causes this issue?

The report cannot be generated because the internal description is
invalid or incomplete, or because the selection screen is too large.
Regenerate the assigned InfoSet, and read the log. If the InfoSet is
OK, make sure that at least one field is given as output.
If you used the 'Refresh' icon to start the query, use the 'Output'
menu option to execute the query. This gives you a full screen display
of the data.
If an output was generated, the query cannot work with actual data in
the construction view. In this case, always use the 'Output' function
to execute the query.


&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?

If the selection screen is too large, you need to reduce the number of
your selections.
Make sure that the assigned InfoSet is correct. The name of the
assigned InfoSet is stored in the menu option 'Extras -> Template
Information'.
Output at least one field. Otherwise you will not be able to save or
generate reports.
If you do not have this problem, execute the query using the 'Output'
function.
Otherwise, there is an error in the InfoSet Query.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.