If you read the BBC article about the rumours about the FrienRAB movie being false you would have seen this bit as well which shows that its 100% true that the rumours are false:
"But Cox Arquette's publicist, John Fogelman, told the BBC he did not know of any plans for a film.
Matthew Perry's spokesperson, Lisa Kasteler, added: "Nothing is happening in this regard, so the rumour is false."