Hi , I actually did create a new blank project from Top Down Template to test issue outside my own projects (reported same issue exists there, as you can read in my last post. My bad English, sorry, still learning).
Only one of my own project gives me in one BP a compiler warning: "No SignatureFunction in MulticastDelegateProperty ‘%s’ ", with no more info or link to any node - this warning exists since migration from version 4.2 to 4.3 and I actually hope since then that any update in future will finally come up with a proper message, so I can track it down. I know of 2 other guys reported this strange compiler message also, but both deleted and totally rebuild their BPs to fix it. I would not like go that way, would rather spend my holiday with my mother-in-law, +25 function, countless nodes, not-that-simple logic, you know.
Btw, would be nice if you could provide any hint on what a “SignatureFunction” , “MulticastDelegateProperty” or “‘%s’” actually could point to. Maybe I can narrow it down on my own.