I need to find allrelated tasks for a given Account, so I'm trying to use searchRecords, but the system gives an error 

{"4832":"Invalid parameter value"}

I understand that the code below is incorrect, but I didn't find anything....

void   firstMeetingDate  ( string accountId ,   date dueDate   )

foundRecords = zoho.crm.searchrecords("Tasks","([Contact Name].Id|=|"+input.accountId+")",1);