The former Scottish first minister also urged the "Remain" campaign to be less "negative."
Former SNP leader Alex Salmond is beginning to round up MPs ahead of the report's publication.
The feud between the Republican frontrunner and Scotland's First Minister is heating up.
The former SNP and prospective MP speaks exclusively to Newsweek from the campaign trail.
Cameron gave an interview on Monday in which he said he wouldn't seek a third term as prime minister.
Polls suggest Scottish National Party could form third biggest party in UK Parliament after May 7 election.
"Out of defeat will come future success," outgoing Scottish National Party leader Alex Salmond told party members on Friday.
Alex Salmond, out-going First Minister of Scotland and figurehead of the independence movement, plots his next moves against the British state
A new jargon-busting website helps cut out the chaff from political speeches, and identify the worst offenders
"People have no confidence in Tory guarantees and they are absolutely fizzing about what looks like a preparation for a betrayal of solemn commitment made," Scottish nationalist leader Alex Salmond said
"For me as leader my time is nearly over but for Scotland the campaign continues and the dream will never die," Salmond told reporters
The SNP leader has all but wiped out a large poll lead for the "No" campaign and will gain from the referendum, even if margin is narrow, say experts
Jim Sillars, former Deputy Leader of the SNP, has warned of tough sanctions for pro-Union banks and big business in the event of a Yes victory
The YES campaign putting on a late surge in the polls, reaching its highest ever level two weeks before the day of the referendum
Alex Salmond challenged David Cameron to a showdown with three weeks until Scots go to the polls
Alex Salmond scored a convincing victory in the final TV debate just three weeks before the independence referendum
The Scottish independence battle is turning to the provision of social services as it enters its final phase