How To Fix UD644 - List not changed ( action interrupted or hit list empty )

SAP Error Message - Details

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 644

• Message text: List not changed ( action interrupted or hit list empty )

What causes this issue?

Filtering by data model was manually cancelled, or returned
an empty set of entity types.

System Response

The list has not been changed.

How to fix this error?

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.