Not all of the ranking list can be created; not enough memory

What causes this issue?

The ranked list can only be partially created because there is not
enough memory.

System Response

When generating the ranked list, the system could not fulfill a request
for memory. There are two possible reasons for this:
The error occurred when the object graph was being processed. If so, the
application creates only a list for bound memory use. All other values
are set to 0, which indicates that this information is not available.
The error occurred when the figures for memory were being calculated. If
so, only the values processed beofre the error occurred are displayed.

How to fix this error?

Call the ranked list at an earlier point in time, in debugging mode.

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.