How do I repair a blueprint that won't compile?

BP_DemoRoom won’t compile. I get the following and have no idea how to proceed:

There isn’t anything in the compare nodes to be compared. It won’t compile until you pass some values / variables to those nodes to actually be compared.

How is that done? My apologies but I’m very new to UE.

Read the error, it’s telling you to connect something to A of type Enum.

In Select Object where it says Select Asset click the little drop menu and select an Enum. You need to do it for A,B and the other A,B not in the picture.

If you, messed it up you can also press ctrl + z to undo.

Not a problem, everyone starts somewhere.

What is it that you’re trying to do? If you can give us a bit more of an outline and if possible, a pic with more of the BP then we’ll be able to steer you in the right direction.

I simply clicked on the BP to drag it into a new blank level. Thank you for your patience,

You would need to bring the missing assets to the new level and reselect them.

Thanks for the nudge but none of the enums from the dropdown is working. The choices (with “enum” typed into the search filter):

  • BP_DemoDisplay_Enum
  • BP_DemoRoom_Enum
  • BP_FlowControl_Enum
  • BP_Graph_Enum

BP_DemoRoom_Enum seems the obvious choice but it doesn’t appear to have any affect when used. When I disconnect the nodes that say “ERROR!” the BP will compile, but the BP only has a couple of lights in it when dragged into the level. Nothing else is visible (meshes, textures, etc.,).

As expected, the BP won’t compile when I reconnect the Wildcard nodes.

Okay, so the issues that drove me back to v4.11 have been resolved, so I’m abandoning this issue and moving back to v4.12.

Thanks much

Check this out the migrate function it allows you to move assets from one project to another with out all the bs.

Something new everyday. Thank you!