Changing UnityInitApplicationNoGraphics directory gives a "You are not allowed to remove the Unity splash screen from your game"

As the title says, when I changed the UnityInitApplicationNoGraphics parameters from:

UnityInitApplicationNoGraphics([[[NSBundle mainBundle] bundlePath]UTF8String]);

to

NSString* newPath = [[[NSBundle mainBundle] bundlePath] stringByAppendingString:@"/unityData/"]; UnityInitApplicationNoGraphics([newPath UTF8String]);

I am getting a "You are not allowed to remove the Unity splash screen from your game" message when trying to run my code.

Is there somewhere special I need to move the image files to when changing this parameter?