Solution :
question tip :
{if((intval(substr(Q1_1.shown,-7,1))+intval(substr(Q1_2.shown,-7,1))+intval(substr(Q1_3.shown,-7,1))+intval(substr(Q1_4.shown,-7,1))>12),'Total of 12 selected ! ','Please select total of 12')}
question validation:
(intval(substr(Q1_1.shown,-7,1))+intval(substr(Q1_2.shown,-7,1))+intval(substr(Q1_3.shown,-7,1))+intval(substr(Q1_4.shown,-7,1))>12)
Thanks anyway..
The topic has been locked.