If you get "undefined variable" it means that Q1 is not your question code and A1, etc. are not your answer codes. Can you provide an export of one of the questions you would like to get this results for here? Export it as an .lsq file and post it here.
You say you use multipe choice, but your example looks like only one answer can be selected.
So I assume that your question type is a "Single choice" ( manual.limesurvey.org/Question_types#Single_choice_questions ) and not "Multiple choice" according to Limesurvey definitions ( manual.limesurvey.org/Question_types#Multiple_choice_questions )
You say you use multipe choice, but your example looks like only one answer can be selected.
So I assume that your question type is a "Single choice" ( manual.limesurvey.org/Question_types#Single_choice_questions ) and not "Multiple choice" according to Limesurvey definitions ( manual.limesurvey.org/Question_types#Multiple_choice_questions )
