I fixed this by deleting the named file, for example. / Users / me / Library / Developer / Xcode / DerivedData / ProjectName -aprzyqkcjkpzgaedatcseafvznfq / Build / Products / Debug-iphonesimulator / Alamofire.framework / Modules / Alamofire.swiftmodule / x86_64.swiftmodule
It is not clear that I am on the right track because the file was not restored, but at the moment I seem to have missed the problem, and to the usual Swift3 conversion errors in my own code.
source share