Ok so I checked out the Web API and it looks like the Web API does not provide the exception detail. I expect something like: "Exception in Task: No file(s) copied".
The method used an sample results are below...Method...http://somedomain.com:80...amp;startDate=2015-08-01 00:00:00&endDate=2015-08-25 23:00:00
Results...taskid,taskpid,started,exitcode,exitcoderesult,executiontime,executionid,hasstandardoutput,hasstandarderror
4bfc81a3-c388-4b2c-a065-5b4bf8e912be,4064290,8/25/2015 5:48:00 AM,77777,Failure,0.124,3da3113a-068d-4e86-b675-332a5b34c04a,False,True
4bfc81a3-c388-4b2c-a065-5b4bf8e912be,4064342,8/25/2015 5:53:00 AM,77777,Failure,0.097,35592451-dead-4a95-bfc3-053de85a218e,False,True
4bfc81a3-c388-4b2c-a065-5b4bf8e912be,4064388,8/25/2015 5:58:00 AM,77777,Failure,0.108,b867a8e2-6a67-444d-bcd6-171e5763489f,False,True
4bfc81a3-c388-4b2c-a065-5b4bf8e912be,4064447,8/25/2015 6:03:00 AM,0,NotSet,0.192,89d43e0e-bca7-444e-982b-31b91d0fc14f,False,True
Thanks