Global symbol "$VERSION" requires explicit package name (did you forget to declare "my $VERSION"?) at D:/ulisseDUE/perl5.26.64bit/perl/site/lib/Tk/Frame.pm line 16, <__ANONIO__> line 21.
Compilation failed in require at D:/ulisseDUE/perl5.26.64bit/perl/lib/base.pm line 100, <__ANONIO__> line 21.
        ...propagated at D:/ulisseDUE/perl5.26.64bit/perl/lib/base.pm line 109, <__ANONIO__> line 21.
BEGIN failed--compilation aborted at D:/ulisseDUE/perl5.26.64bit/perl/site/lib/Tk/Toplevel.pm line 10, <__ANONIO__> line 21.
Compilation failed in require at D:/ulisseDUE/perl5.26.64bit/perl/lib/base.pm line 100, <__ANONIO__> line 21.
        ...propagated at D:/ulisseDUE/perl5.26.64bit/perl/lib/base.pm line 109, <__ANONIO__> line 21.
BEGIN failed--compilation aborted at D:/ulisseDUE/perl5.26.64bit/perl/site/lib/Tk/MainWindow.pm line 5, <__ANONIO__> line 21.
Compilation failed in require at D:/ulisseDUE/perl5.26.64bit/perl/site/lib/Tk.pm line 192, <__ANONIO__> line 21.
Compilation failed in require at D:/ulisseDUE/pm-cb-Mar2019/lib/PM/CB/GUI.pm line 38, <__ANONIO__> line 21.