asp.net mvc - Print Dynamically created table by Rotativa -

i creating dynamic table list using json stored procedure. need print dynamically created list of table using rotativa. here controller code:

public actionresult merit(int students)     {        ...        ...             return json(list, jsonrequestbehavior.allowget);         }         catch (exception ex)         {             throw ex;         }     } 

i tried :

public actionresult meritlisttopsd()     {         return new rotativa.actionaspdf("merit");     } 

but gives error of "the parameters dictionary contains null entry parameter 'students' of nonnullable type"

please if have idea

wiki