The calculation procedure may be initiated for a single CPTU file or for all files in the current working project. To perform a calculation for the selected single CPTU file click on the Data menu and select the Calculate selected CPT command or you may click on the 
button located on the File manager toolbar. To perform an overall calculation for all CPTU files in the current project, click on the 
button on the main window toolbar. When performing an overall calculation the software will also perform the basic interpretation calculation.