The lead actress and her mother are shown visiting Berlin before 1936. One of the buildings shown is the New Reich Chancellory. Construction on this building didn't begin until 1938 and it wasn't open until 1939.
As the MGM executive is waiting in vain for Lida, the airplane that he is standing by has "USAF" markings on its right wing. As this is set in pre-World War II, the markings should have been "US Army" as the USAF didn't come into being until 1947. On the same airplane, however, are "British Airways" markings over the passenger door. Odd combination.
Reich Minister Giebels assembles German actors post 1933 in the Kroll Opera House to warn them against leaving Germany for opportunities in the United States. By this time however the opera house had already been transformed into the unmistakable meeting place for the Reichstag, and was no longer a public theatre.
Gustav Fröhlich told Lida that he doesn't want to move to Budapest with his wife. However according to Fröhlich's autobiography he and his wife Gitta Alpar left Germany in 1933 and moved to a suburban town near BUdapest, where their daughter was born in 1934.
The filming of Die Fledermaus (1937) took place in 1937. In a scene after that Lida Baarova complaints to Gustav Fröhlich that he is still not divorced from his wife. However by that time he was already divorced and Gitta Alpar lived in Engand.
During the chronicle montage of Lida Baarova movies after her life in Nazi-Germany La sua strada (1946) is shown for the year 1943 while it was released in 1946. Nevertheless the year is correct, because the filming of the movie took actually place in 1943.