"menu item with the same name already exists" warning after creating assemblies

Question

After I broken down my project in assemblies I started getting errors like this

 Cannot add menu item 'Assets/Create/Abilities List' for method 'AbilitiesListBuilder.Create' because a menu item with the same name already exists.

Just in case, I searched for text "Assets/Create/Abilities List" in entire project. There is only one place with it. I checked debug console to see what assemblies are loaded. There is only one "Editor" assembly (custom, created by me). There is no Unity's default Editor assembly loaded.

What can it be and how to fix it?

Update: I have Unity 2018.4.9f1

Answer 1

Answer by LinQuest_Jordan_Smiley · Oct 27, 2019 at 09:01 AM

I have the exact same issue, I have only one deceleration of a menu item, yet Unity is throwing up a warning that it cannot add the menu item as it already exists. I don't know the solution to this, but I think it may be a bug in Unity's system. It seems that each time Unity is opened, it is trying to add this menu item, but as it was added previously, it cannot be added again. My error is popping up in Unity 2019.1.0f2 I haven't done anything with my assemblies, just using Unity as usual and it pops up every time

This may be better as a bug report rather than a question on this forum

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"menu item with the same name already exists" warning after creating assemblies

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