Invalid PGN, can you find the error? I don't found it

Hi, Lichess says me that this PGN is invalid.. What's the problem??

[Event "CIS 2016"]
[Site "Cammarata, AG"]
[Date "2016.12.03"]
[Round "3"]
[White "Savitteri, Calogero"]
[Black "Barbagallo, Andrea"]
[Result "0-1"]

1. d4 e6 2. c4 Nf6 3. Nf3 b6 4. a3 Be7 5. Nc3 Bb7 6. Qc2 d5 7. cxd5 exd5 8. Bf4 a6 9. e3 0-0 10. Bd3 Nbd7 11. Ne5 Bd6 12. Nxd7 Qxd7 13. Bxd6 Qxd6 14. Ne2 Rfe8 15. 0-0 h6 16. b4 Ne4 17. Nc3 Rac8 18. f3 Nf6 19. Rfe1 Re7 20. Qf2 Rce8 21. Rab1 g6 22. Rb2 Kg7 23. Kh1 Re6 24. Nd1 Nh5 25. Ree2 Qd7 26. b5 a5 27. a4 Qe7 28. Ra2 Kh7 29. Qe1 Ng7 30. Rac2 Rd8 31. Qc3 Rc8 32. Qe1 Qd6 33. Qd2 Rce8 34. Re1 Nh5 35. Re2 Qe7 36. Kg1 Qd6 37. Kh1 Rf6 38. Kg1 Qe7 39. Nf2 Re6 40. Nd1 Bc8 41. Qc1 c6 42. Rxc6 Nf4 43. Rxe6 Nxe2+ 44. Bxe2 Qxe6 45. Qc6 Nd7 46. Qxe6 fxe6 47. Nb2 Rc8 48. Bd1 Rc1 49. Kf2 Rb1

Thanks!

45...Nd7 is an invalid move.

Thanks very much! It's Bd7 but I write Nd7, it was a simple blunder ;)

@duropo Did you really play through the whole sequence just to find the wrong move? Or could you tell just by looking at it?

@4

pgn-extract can detect some errors in pgn.

www.cs.kent.ac.uk/people/staff/djb/pgn-extract/

Oh wow, I didn't know about this site! Very interesting!!

That program is considered the "swiss knife" of pgn :-))