the file exchange function should be included by the compiler at the time of packaging, to be able to access it,every time it execute the code. How do I include the file? or is there any modification in the code needed?
'App Designer' is a good addition to the list of toolboxes in MATLAB, but I prefer to go with traditional approach of GUI design and then converting it to MATLAB App. This traditional approcah gives you freedom to add multiple files while designing creating an app using 'Package App' option. Attaching the files would never be a problem with GUIDE and Package App options. You can try that and it will surely solve your challenges.