UE4 解决无法保存场景datasmith错误-Graph is linked to private object(s) in an external package

使用UE4 datasmith 并将Actor创建蓝图后，将此蓝图拖拽到场景level中，无法报错，出现下面报错。

Message dialog closed, result: No, title: Message, text: Can’t save D:/xxxxx.umap: Graph is linked to private object(s) in an external package.
External Object(s):
DatasmithAssetUserData_1
DatasmithAssetUserData_1
DatasmithAssetUserData_1
DatasmithAssetUserData_1
DatasmithAssetUserData_1
…

Try to find the chain of references to that object (may take some time)?

出现原因，Datasmith信息导致。

解决方法，删除component中的datasmith信息。

打开蓝图，全选中component，再detail中找到 Asset User data，点击删除，保存即可。