Google has been given until Sept. 15 to reach a deal with authors and publishers over Google Books. (Mark Lennihan/AP)

Reuters reported that U.S. District Judge Denny Chin told both parties in a Tuesday hearing that he was frustrated that they had not reached an acceptable settlement in the six-year-old case.

According to the Reuters report, authors and publishers are seeking an “opt-in” model that includes the work of those who agree to have their material included in the digital library, rather than the “opt-out” model, which requires those who don’t want their material request to have their work removed.

Chin rejected a settlement this past March, saying that it went “too far” in granting Google an advantage over copyright holders and its competitors.

In March, the Justice Department said that the court had reached the right result on the rejected settlement. “We are pleased that the court supported our position,” Gina Talamona, a spokeswoman for the Justice Department, told The Post.