Excel PivotTable using external data

When storing a GAMS symbol each nonzero in a separate row in Excel, we quickly run out of space on older versions of Excel. Excel before Office 2007 could only handle up to 65,536 rows. To display larger pivot tables, we can write the GAMS symbol to a CSV file and use this CSV file as external data store for the Excel pivot table. This allows for larger data sets than the above mentioned row limit. See also http://www.amsterdamoptimization.com/pdf/toolhelp.pdf.