Each time I attempt to import some species data from an xls file to be plotted onto a map, the program becomes very slow and eventually becomes unresponsive. My dataset originally included 15000 separate points so I tried importing only 2000 of them and the same error occurred. Am I simply trying to import too much data at once? If so, can this be overcome? I then intended to analyse my species distribution against the imported climatic data to discover a statistical relationship.