Most comman Errors in software?

1. User Interface Errors:- Missing /Wrong function does not do what the user wants to expect.missing information, Inappropriate error message,performance issue ,Cant redirect o/p.
2. Error Handling:- Overflow,data comparison ,Error recovery,Aborting Error recovery from hardware Problems.
3. Boundary Related Errors:- Boundaries in loop,Space,Time,Memory,mishandling of case outside boundary.
4. Calculation Errors:-Bad logics,bad arithmetics outdated constant calculation error.wrong formulas,incorrect approximation.
5. Hardware.
6. Secure Version & id control.
7. Testing Errors.
8. Load Condition.
9. Control Flow Errors.