Report API

Does anyone use the Report API with success? We are trying to get get hours per time card grouped by a custom field on the company object. It seems like the Report API doesnt allow for "Group By" or "Filtering" beyond 1 level. EX /attask/api/v10.0/proj/report?apiKey=YOURKEY&hours:hours_AggFunc=sum&hours:timesheet:endDate=2019-02-09&company:name_2_GroupBy=true&owner:name_1_GroupBy=true Error: { "error": { "class": "com.attask.common.InvalidParameterException", "message": "Invalid Parameter: Search Parameter value \"hours:timesheet:endDate\"", "title": null, "msgKey": "exception.invalidparameter", "attributes": [ "Search Parameter", "hours:timesheet:endDate" ], "code": 1000 } } /attask/api/v10.0/proj/report?apiKey=YOURKEY&hours:hours_AggFunc=sum&hours:project:company:DE:Account Code_2_GroupBy=C&owner:name_1_GroupBy=true The Group By doesnt error, it just returns back an empty node. "Person 1": { "": { "dcount_ID": 32, "sum_hours_hours": 206.75, "owner_name": "Person 1" } }, "Person 2": { "": { "dcount_ID": 7, "sum_hours_hours": 23.68, "owner_name": "Person 2" } } Brad Baker