Build Error: Cannot create an instance of an interface or abstract type

Forums › 💬 NodeCanvas › ⚙️ Support › Build Error: Cannot create an instance of an interface or abstract type

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  • January 23, 2023 at 8:20 pm #15446
    requios
    Participant

      I’m getting an error when trying to run a behaviour tree in a build. I tried several builds now with all sorts of things tweaked, but honestly I don’t really know where to look from this error message. Any idea where to look?

      https://pastebin.com/uk15NMxP

      January 23, 2023 at 9:50 pm #15449
      Gavalakis
      Keymaster

        Hello. It seems that an action task used in the graph is not able to deserialize. Can you please confirm that your tree don’t have any missing action tasks (or other error logs in the Graph console in the editor)? Are you using any custom action tasks by the way? Could you also please share your behaviour tree to test it out locally?

        Thank you in advance!

        January 26, 2023 at 7:44 pm #15448
        requios
        Participant

          Hi. I mentioned it in discord but forgot to mention it here. I was using Unity 2021.3.6, then upgraded to 2021.3.16 and that fixed it. Just fyi, I didn’t have any errors or missing tasks, I was using an abstract task  for most tasks (as in, actions within an actiontask), but I’m guessing thats pretty normal behaviour.

          February 3, 2023 at 6:34 pm #15447
          Gavalakis
          Keymaster

            Hello again.

            Thank you for the update and information. I am glad this was fixed when you updated the Unity version.

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