Hi! i was trying to get the sum of a custom value column like this: array(

"label"=>"ST",
"value"=>function($row){
    $cvon=10;
    $cvof=15;
    $off=5;
    $result=(($row['on']+$cvof+$off)-$cvon-$cvof-$off);
    return $result;
},
"footer"=>"sum",
"footerText"=>"Total: @value"

) but it returns "Notice: Undefined index: __custom0" any idea? Thanks!

Solved: I had Created a calculated column, so with this the problem is solved.