>> Export.templates
TypeError: can't convert nil into Integer
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:713:in `pack'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:713:in `write_row'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:726:in `write_rowblock'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:725:in `each'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:725:in `write_rowblock'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:734:in `write_rows'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:733:in `each'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:733:in `write_rows'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:457:in `write_from_scratch'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:444:in `write_from_scratch'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:444:in `each'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:444:in `write_from_scratch'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:620:in `write_workbook'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/writer.rb:15:in `write'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/writer.rb:14:in `open'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/writer.rb:14:in `write'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/workbook.rb:106:in `write'
	from /home/guda/Truckhandboken/app/models/export.rb:271:in `export'
	from /home/guda/Truckhandboken/app/models/export.rb:255:in `templates'
	from (irb):4>> Export.templates
TypeError: can't convert nil into Integer
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:713:in `pack'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:713:in `write_row'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:726:in `write_rowblock'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:725:in `each'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:725:in `write_rowblock'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:734:in `write_rows'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:733:in `each'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:733:in `write_rows'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/worksheet.rb:457:in `write_from_scratch'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:444:in `write_from_scratch'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:444:in `each'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:444:in `write_from_scratch'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/excel/writer/workbook.rb:620:in `write_workbook'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/writer.rb:15:in `write'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/writer.rb:14:in `open'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/writer.rb:14:in `write'
	from /usr/lib/ruby/gems/1.8/gems/spreadsheet-0.6.4/lib/spreadsheet/workbook.rb:106:in `write'
	from /home/guda/Truckhandboken/app/models/export.rb:271:in `export'
	from /home/guda/Truckhandboken/app/models/export.rb:255:in `templates'
	from (irb):5>>