How do I sum of sub report total in main report

Quote:

You can add up the values passed back from the subreport by keeping track of them via a global variable in the main report.

//Initialize the variable in the Group Header of the main report
whileprintingrecords;
numbervar groupsub := 0;

//Update the variable in the Details section of the main report
whileprintingrecords;
numbervar groupsub;
shared numbervar subval;

groupsub := groupsub + subval;

//Print the accumulated group value in the Group Footer of the main report
whileprintingrecords;
numbervar groupsub;