Now you ask the same question in three really outdated posts.
Would be better you open a new post with an attached sample of your survey (*.lss) with the relevant questions.
I assume 4A and 4B are two questions of type multiple numerical input.
And if you'd read the manual here
www.limesurvey.org/manual/Expression_Man...code_variable_naming
and
www.limesurvey.org/manual/Expression_Man....22that.22_variables
Having read this
"Here are the details of how to construct a Qcode (and access some properties) by question type. In general, Qcodes are constructed as:
QuestionCode . '_' . SubQuestionID . '_' . ScaleId"
you know that your equation has to look like this:
{sum(QuestionCode_SubQuestionCode1,QuestionCode_SubQuestionCode2,QuestionCode_SubQuestionCode3,...)}
If you can use the "that"-variable you can shorten to
{sum(that.QuestionCode)}
Joffm