Solution:

Here're a simple example for your reference. After convert the historical trend data, you'll got the file HIST01.TXT, then you can use Excel or DOS Edit to retrieve those data. Besides, the "Conversion Time Period" is also the key point of data conversion. As you know the default date/time will be the current system date/time when you launch this function. So, you have to adjust them to meet your strategy. For example, when you execute this strategy between 12/08/99 09:10 and 12/08/99 11:24, then you must setting the date/time 'From' 12/08/99 08:10, and setting the date/time 'To' 12/08/99 12:24, to make sure convert those data completely. If you don't adjust them, then you'll get empty text file.