Well I did another test.
I picked up the 16705 archive unpacked in c:\ on my pc (where there is the problem) and in a virtual machine running same os (win10).
On my PC the parser on the button examples (but also in all other program) gives a lot of syntax error (but build correctly),
on the virtual machine theide works as expected.
I did a binary compare of the c:\upp directory on both my and the virtual machine and that are identical.
So I guess the problem is theide and the problem is located in some information stored on my pc and used by theide outside
the upp directory.
I ask please if one of the developers could give some inside. Thank you