Efforts by the UN special envoys to find common ground between both parties did not succeed. By 1999 the UN had identified about 85,000 voters, with nearly half of them in the Moroccan-controlled parts of Western Sahara or Southern Morocco, and the others scattered between the Tindouf refugee camps, Mauritania and other locations throughout the world. The Polisario Front accepted this voter list, as it had done with the previous list presented by the UN (both of them originally based on the Spanish census of 1974), but Morocco refused. As rejected voter candidates began a mass-appeals procedure, the Moroccan government insisted that each application be scrutinized individually. Continuing disputes between the two factions once more brought the process to a halt.