Xcode: could not load ModelIO.framework, SceneKit.framework, etc

Question

Before updating to macOS Mojave my app ran fine without errors, however, I get this error after the update. I have been Googling for 2 days but it seems no one has run into this error yet. Note: The app does run as expected. The 3D model file is in the .scn format.

Buildtime error:

/scntool:-1: Could not load ModelIO.framework ((null))
/scntool:-1: Could not load SceneKit.framework ((null))
/scntool:-1: Could not load PhysicsKit.framework ((null))
/scntool:-1: Could not load Jet.framework ((null))
/scntool:-1: Could not load SpriteKit.framework ((null))
/scntool:-1: The document /Users/salman/Library/Developer/Xcode/DerivedData/JellyFish-fhvcybjymvohlxflnwnxqdepqlrl/Build/Products/Debug-iphoneos/JellyFish.app/art.scnassets/Jellyfish.scn is not an archived scene.
/scntool:-1: Conversion failed, will simply copy input to output.
/scntool:-1: Copy failed file:///Users/salman/Library/Developer/Xcode/DerivedData/JellyFish-fhvcybjymvohlxflnwnxqdepqlrl/Build/Products/Debug-iphoneos/JellyFish.app/art.scnassets/Jellyfish.scn -> file:///Users/salman/Library/Developer/Xcode/DerivedData/JellyFish-fhvcybjymvohlxflnwnxqdepqlrl/Build/Products/Debug-iphoneos/JellyFish.app/art.scnassets/Jellyfish.scn error:Error Domain=NSCocoaErrorDomain Code=516 "“Jellyfish.scn” couldn’t be copied to “art.scnassets” because an item with the same name already exists." UserInfo={NSSourceFilePathErrorKey=/Users/salman/Library/Developer/Xcode/DerivedData/JellyFish-fhvcybjymvohlxflnwnxqdepqlrl/Build/Products/Debug-iphoneos/JellyFish.app/art.scnassets/Jellyfish.scn, NSUserStringVariant=(

Edit: The error has now disappeared without any reason. It's happened before. The error shows up, disappears, then shows up again. Strange.

Answer 1

My cause was that the command line tools setting was empty. I solved by setting Command Line Tools in XCode Menu > Preference > Locations.