This might sound basic but I want to get something confirmed before we move on. Can you make a text box with condition:
This indicates whats happening in the inbox and might provide better insight on the issue (ofcourse you might have already tried it, if so please share the details).
I had tried it all.
if(v_INP='z',1,0) returns 0 and doesnot show the chart
BUT, if I put a semicolon after z in the variable list values, then 1 is returned and the chart appears
Logically, it is considering a space or missing value after Z, as we are not putting a termination semicolon(which is wierd and unusual).
hence 'z' is not matching v_INP(which is I suppose z+space or z+missing).