In a custom framework containing both Objective-C and Swift code, the Swift compiler throws the following error:
[build_pat
In Xcode 7 Beta, with Swift 2, it will also happen if your Framework Header is not declared as "Public"
For instance, I had a Cocoa Touch Framework with a "Project" visibility for the header file, and the error "Umbrella Header ... not found" for all Swift files in my project, once I had the header "Public", the error went away