As the only basis for re-opening the investigation was the appearance of new evidence is the Portuguese court questioning the legality of the criminal inquiry?
It wasn't possible to prove that the investigation was reopened because new evidence appeared. Possibly because the details weren't released. The matter of new evidence was raised again by the McCann's lawyers in the request for an annulment of the SC judgement.
However, inside the factual matter established as proved in the minutes, there is no fact capable of constituting ground for the review or reopening of the investigation in question,
http://www.gerrymccannsblogs.co.uk/Annulment_request.htmThey seem to be saying that there was nothing to justify the review or the reopening within the existing evidence. The PJ review began, unannounced, in March 2011; before Operation Grange began.
With that objective, the National Director of the Judiciary Police, in March 2011, assigned to a team of investigators from the North Directorate a task to re-examine the whole wide range of information contained in the inquest, with the aim to identify information whose further understanding could be revealed useful and possible.
That reanalysis task, which took place during the last two and a half years, helped identify new evidence, which by imposing further investigation, meet the requirements set by article 279º no 1 of the Code of Criminal Procedure for the reopening of the investigation.
http://www.gerrymccannsblogs.co.uk/Nigel/id466.htmThat sounds like the review wasn't preceded by the discovery of new evidence to me, it sounds like a fishing expedition to me. Cases archived under 277/1 could only be reviewed or reopened if brand new evidence appeared which was not in the investigator's possession at the time of archiving.