To print the mark sheet, go to Examination > Print MarkSheet then select the Exam Group, Exam, Session and Class, Section, and MarkSheet Template, and then click on the Search button. The list of searched records will be shown below on the page.
Now select all the students to generate for mark sheet and click on the Generate button present on the right side in the student list, at the click of this button mark sheet will be open.
Note: Do not print the mark sheet directly, here select the Destination (save as pdf) and save the pdf file, and then print the mark sheet using this pdf file.