They felt that its plot was so similar to the recently released Stanley and Livingstone (1939) that it could not be made as written without seeming too derivative, so they turned the project over to Frank Butler and Don Hartman, the writers on the wildly successful Road to Singapore which Paramount had released the year before.
The filmmakers felt that their movie's plot was too similar to Stanley and Livingstone (1939) and decided to change it. They gave the project to Frank Butler and Don Hartman, who wrote the popular Road to Singapore film.