GENE_ANNOT_ERR = 'Err: assign_locations_to_genes, You have not initialised a gene information object yet.'\
                          '\nSee set_annotation_from_file if you already have an annotation file or '\
                          'set_annotation_using_biomart to make a new one (uses biomart).\nDetails to '\
                          ' make an annotation file can be found in the package scibiomart.'