Often they made the mistake of recalling the ending of the relationship, rather than the loving connection itself. For instance, they might recall the last heated argument that led to the breakup, or the ugly divorce process, the horrible terminal illness, or whatever other unpleasant events resulted in the ending of the relationship, rather than the loving relationship itself.
Even when they recall this event in a dissociated way, as if seen on a TV screen, the feelings are of unpleasantness, rather than loving connection. Many people recall these events as if they were happening here and now, with the full intensity of the unpleasantness of the original event. This ending of the relationship is not the precious experience that the person is grieving for, and this common mistake makes it impossible to experience the special loving feelings that they had with the lost person.
When someone recalls the ending, one of the first steps in the process is to ask them to think of what they loved and appreciated about the lost relationship, rather than the end of the relationship. This is a request to the client to change the content of their representation.