non important issue

When I open from terminal bash shell vimtutor-sequel with your standard cmd "vim -u vimtutor-sequel.vimrc -U NONE vimtutor-sequel-copy.txt" I get a series of error that I skip and go to tutor very well, non importat errors Be Quiet!. The errors are about a plugin of changing dates (not an important thing for tutor): Se ha detectado un error al procesar /home/jazei/.vim/after/plugin/speeddating.vim: línea 6 E492: No es una orden del editor: SpeedDatingFormat %A, %d de %B de %Y línea 7 E492: No es una orden del editor: SpeedDatingFormat %A %d/%m/%Y línea 8 E492: No es una orden del editor: SpeedDatingFormat %H:%M línea 9 E492: No es una orden del editor: SpeedDatingFormat %A %d Pulse INTRO o escriba una orden para continuar May be you can say me if there is an option for not show errors at starup of Vim... I saw in vim --help an option --not-a-term maybe there is one for skip errors... Thank you and Regards!