When you move objects within a BPMN diagram, the BPMN modeling constraints dialog opens if you attempt to create connections that are not allowed. As a rule, you can enable or disable the BPMN modeling constraints dialog.
Procedure
Click ARIS > Options.
Navigate to Model > General > Objects.
Select the relevant option for the behavior from the Handling of irregular connections in BPMN drop-down list.
Click OK.
You have defined whether or not the BPMN modeling constraints dialog is displayed if irregular connections occur in a BPMN diagram.