See this thread: https://software.intel.com/en-us/forums/intel-fortran-compiler/topic/831101. Your issue is along the same lines as this thread, the debugger is not aware - as it can be IMO - with many newer Fortran language facilities. If you need to view "data" in the debugger, like with object 'a' which is of integer type, add some "temporary" Fortran code e.g., using SELECT TYPE construct and 'step' through it in the debugger.
