HistData is a utility program that comes with Wonderware InTouch. It can retrieve data from InTouch historical log files via DDE and then write the requested data to csv files. HistData can not be used alone; another program is required in order to update HistData’s internal database items. This Tech Note gives an example of how to use HistData with InTouch and Microsoft® Excel™. In addition, common error messages and problems associated with HistData are presented with suggested solutions. The appendix at the end of this Tech Note contains detailed information about the items that are in the HistData internal database.