Hello, When I use the Write to Spreadsheet File.vi to append data to an existing Excel file, the data I input doesn't appear in the file.All I get is replace the Excel file by the new data and I loss the old data. This is due because Excel changes tab-delimited format. There is a KB than explains it:
http://digital.ni.com/public.nsf/websearch/D1629D863F0442CC86256A0200558A15?OpenDocument You could use the Report Generation Toolkit to avoid this Excel formatting. Look at the following KB and you will see that it is possible: http://digital.ni.com/public.nsf/websearch/EFCE1C25DCE7483E86256CAF00539451?OpenDocument If you don't have Report Generation Toolkit, try to contact to NI regards crisR