Why does the Change Pattern tool does not work with Patterns placed by Points with Association turned off?
When placing the Pattern by Points with Associative Pattern turned Off, it creates pattern elements without an enclosing area.
Therefore, when "repatterning" it with the Change Pattern tool, it does not have an enclosing boundary in which the pattern components would be bound if the components were changed.
https://communities.bentley.com/products/microstation/w/microstation__wiki/10386/gap-between-cell-elements-in-a-pattern