The editor crashes when trying to merge blueprints, the crash usually happens on merge completion when selecting either source or target, or when clicking on a property in the properties panels.

Thank you for the report. The videos and screenshots were quite helpful. I have logged this as JIRA UE-10016 and our developers will be investigating the issue further. There isn’t much of a workaround for this at the moment. While 4.7 is in Preview this feature isn’t stable enough to use produc…

[4.7 p7] Blueprint merge crashes editor

Development Programming & Scripting Blueprint

Reality-X (Reality-X) March 4, 2015, 3:04pm 7

It seems this is still an issue. I created a new post here and attached my sample project files.