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Struct property can't be edited in level

(Copied from https://answers.unrealengine.com/questions/697408/struct-property-cant-be-edited-in-level.html)

I have a struct property, which contains instanced object property. After upgrading to UE4.17, it can't be edited in level.

alt text

This struct contains a instanced object property. I think this is the cause. A change in UActorComponent::DetermineUCSModifiedProperties() causes the problem. In UE4.16, it's like this:

      virtual bool ShouldSkipProperty(const UProperty* InProperty) const override
          return (    InProperty->HasAnyPropertyFlags(CPF_Transient | CPF_ContainsInstancedReference | CPF_InstancedReference)
                  || !InProperty->HasAnyPropertyFlags(CPF_Edit | CPF_Interp));

But in UE4.17, it's like this:

      virtual bool ShouldSkipProperty(const UProperty* InProperty) const override
          return (    InProperty->HasAnyPropertyFlags(CPF_Transient)
                  || !InProperty->HasAnyPropertyFlags(CPF_Edit | CPF_Interp));

  You can see that CPF_ContainsInstancedReference | CPF_InstancedReference is removed in UE4.17. So my struct is always added into UCSModifiedProperties, and it's treated as const. :(

Product Version: UE 4.17
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asked Aug 28 '17 at 09:24 AM in Bug Reports

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Xu Nie
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