Recently added first swift file to large obj-c project. Compile and run in simulator is fine. Attempt to compile and run for a device and I get a file not found error on the obj-c compiler generated swift header file (aka Objective-C Generated Interface Header Name ending with -swift.h)
I have confirmed (at least to my knowledge) that project settings are correct and can see the file in the (derived data) file system for debug / simulator builds but nothing else.
Have looked at this and this but have not helped. Using xCode8 GM