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Created attachment 245723 [details] SequenceDiagram project Steps to reproduce: - Create an interaction model,activate the "Interaction" Viewpoint from Sirius example and create a Sequence Diagram (or import the attached modeling project) - Create a Sync Call or an Async call (one a single lifeline or from one Participant to another) - Delete the Execution - KO: The messages stay, but it is impossible to delete the top message - Close & reopen the editor : deletion is now possible
Confirmed. Note that the fact that the messages stay (and are reconnected to the lifeline) when the execution is deleted is the expected behavior. What is problematic here is that after the execution has been deleted the top message can neither be moved nor deleted.