Realm - module file was created by an older version of compiler

Question

I use latest version of xcode and swift 2.2. One of my projects, which I havent open for several month now not building, because of error module file was created by a

Answer 1

I had this issue when upgrading from Swift 2.2 to Swift 3.0, specifically for Realm Swift cocoapod. I think this solution should work for this general issue. Here is what worked for me:

(1) Go to derived data folder /Users/(yourUserName)/Library/Developer/Xcode/DerivedData

(2) Select project with error

(3) Delete

(4) Clean project

(5) Run

Cleaning initially did not work for me. Hope this helps!