Please read my post again, I mentioned only some, not all possible reasons as I don't have currently the source code to list them all. And, only last 2 possibilities Autohex will fail ( there is no way to recover anything in these cases by any software offline). I will ask developers to check if it is possible to launch FA manager from on bench even if FA is blank or corrupted.
If you have an invalid I-step only, Autohex will not complain, but you will not be able to do online programming, coding and manual coding will be ok.
If you have conflict/missing FA item, Autohex will not complain too, you cannot program and you cannot code all ecus.
If you have in FA an invalid item, will be treated as missed item.
If Checksum error, you will get only a warning.
If we will follow your advice by sorting details of every kind of error in 1000s of functions in our program, we will have more than 10000s errors in our list. For some functions we use only Boolean results, means that if the function succeed or failed, no details, we may find out the problem from log files to help customers.
As I know, no software in the world will be able to tell end user where precisly the error happened in all functions as this will be almost impossible. That's why the log files exist.