Hi i have groups based on category name and i wanna index the pages based on category for example category1....page 3 category2...page 18 this is my info variable name: indexText class: String Reset type: report Incrememnt type: group calculation : nothing variable expression $V{indexText} = $F{CATEGORY_DESCRIPTION}+ "........ " +$V{PAGE_NUMBER} it gives me the error "left hand side of the expression has to be variable???? Help and thanks in advance