A report from the British government says there hasn't been enough of an investigation into what Scotland has in mind for security, intelligence and diplomatic affairs if it votes for independence next year.
"There needs to be a more realistic assessment of the extent to which Scotland could expect the rest of the United Kingdom to cooperate with, and support it, on security and intelligence," the House of Commons said.
Scotland is to have a referendum for independence from Great Britain on Sept. 18, 2014. Scottish First Minister Alex Salmond said an independent Scotland would continue within the European Union and NATO.
The House of Commons report said a number of Scottish decisions seem to be based on a belief that "goodwill for Scotland will trump difficulties."
British Foreign Secretary William Hague said Salmond's administration hasn't spelled out what independence would mean in terms of diplomatic affairs.
The Scottish government continues to present unfounded assertions as incontrovertible facts and conclusions, when the truth of the matter is very different," he said in a statement.
There was no comment from the Scottish government.