'filenames are used to distinguish private declarations of the same name' error

Question

I am getting this error on generating an NSManagedObject in Xcode 8.1 in Swift.

:0: error: filename \"DemoOne+CoreDataClass.swift\" used twice: \'/Us

Answer 1

In my case Data Model (as example: MyCoreData.xcdatamodeld) was listed twice under Editor -> Create NSManagedObject Subclass... And here was reason why it was getting this type of error.

What I did:

1. I did delete MyCoreData.xcdatamodeld file.
2. Created another Data Model as example MyCD.xcdatamodeld.
3. Checked is here duplicated Data Models in here: Editor -> Create NSManagedObject Subclass...
4. Clean and later build for two times.