Kate and Gerry McCann have issued a renewed plea for anyone in Portugal with information about Madeleine to come forward.
The couple are in Lisbon where they are suing the former lead investigator in the case of their missing daughter, Goncalo Amaral.
Outside court, they held up placards with pictures of Madeleine and a Portuguese telephone number for people to call.
Mrs McCann said: "The important thing to remember is that a child is still missing."
The couple also said they wanted the whole investigation into their daughter's disappearance to be reviewed by Portuguese and British police.
They had earlier heard the final legal arguments in their fight to ban a book written by Mr Amaral.