This seems like such an easy problem, yet I am having difficulty finding a solution. I have a repeat section containing an integer text box. I would like to prevent the user from adding additional repeat groups until they have entered data into the first.
I have attempted string-length(.)!=NULL, string-length(.)!=0, and string-length(.)!=-1 in the constraint section of the integer field. I have also tried .!=0 and .!=NULL. Nothing seems to work.
Any suggestions for this simple problem?