On 'No beginning found' message

[Angelo Graziosi]

When a .f90 file start with comment lines. i.e.

$ cat hello.f90
! Line 1
!      2
program hello
  print *,'Hello World!'
end program hello

and the cursor is there (lines 1,2), in the minibuffer there is always 
the message:

'No beginning found.'

This is annoying when one have to input or read something in the 
minibuffer: the above message hides it and one should move the cursor 
out that region.

Why that message?

Usually there is the habit to start (*begin*) every source code with 
comment lines (also many *.el file of Emacs are designe in this way), 
but only with .f90, it seems, the above message appears.

Cheers,
   Angelo.