Too many lines may result in a memory overflow.

What causes this issue?

You have entered a maximum number of hits, which could exceed the
maximum amount of memory for the table selected. This may also occur if
you do not make an entry in the maximum number of hits, as all lines
should then be read.

System Response

The system calculates the probable use of memory, and adjusts the number
of lines to the largest possible value. In the standard system, a memory
requirement in the order of 1.5 GB is allowed. If you would like to
change this value, make an entry in table T811FLAGS with the following
values:
TAB = 'SE16H'
FIELD = 'SELSIZE_MAX'
VALMIN = the value in bytes corresponding to the amount of memory
(minimum 10,000)
If you make the value too high, the memory available may be exceeded.

How to fix this error?

You do not need to do anything further. The correct value is
automatically transferred.

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.