To view the records formatted, you must apply the structure file to the data file, which you do when opening the data file.
The Open Data File dialog box appears.
Because you saved the structure file with the same name as the data file, and in the same location, it is already selected in the Structure File (optional) field; if you had saved it elsewhere or named it differently, you would need to click Browse and select it.
The contents of datavseq.dat are displayed using the structure file: