Ошибка при выполнении большого отчета

    def execReportFromString(self, start, end, unit_id, stringTemplate, reportResourceId):
        url_server = self.url_api
        sid = self.eid
        url_report = '/wialon/ajax.html?svc=report/exec_report&params='
        url = url_server + url_report
        s_start = 0
        s_end = 0
        while end - s_start > 1295999:
            s_start = start
            if stringTemplate['n'] != "АПи групповой":
                s_end = end
                s_start = end
            elif end - s_start > 1295999:
                s_end = start + 1295999
            else:
                s_end = end
            param = {
                "reportResourceId": reportResourceId,
                "reportTemplateId": 0,
                "reportObjectId": unit_id,
                "reportObjectSecId": 0,
                "reportTemplate": stringTemplate,
                "interval": {
                    "from": start,
                    "to": s_end,
                    "flags": 0
                }
            }
            data = json.dumps(param, separators=(',', ':')) 
            connect = url + data + '&sid=' + sid
            response = requests.post(connect)
            dict_ans = response.json()
            start += 1296000
            result_table = []
            global_result = {}
            for i in dict_ans['reportResult']['tables']:
                name = str(i['label']) 
                result = name
                result_table.append(result)
            nums_of_tables = int(len(result_table))
            print(nums_of_tables)
            for i in range(nums_of_tables):
                url = url_server + '/wialon/ajax.html?svc=report/select_result_rows&params='  
                param = {
                    "tableIndex": i,
                    "config": {
                        "type": "range",
                        "data": {
                            "from": 0,
                            "to": 400000,
                            "level": 6,
                        }
                    }
                }
                data = json.dumps(param, separators=(',', ':')) 
                connect = url + data + '&sid=' + sid
                response = requests.post(connect)
                name_table = result_table[i]
                rows_of_table = response.json()
                if name_table not in global_result:
                    global_result[name_table] = rows_of_table
                else:
                    global_result[name_table] += rows_of_table
            if stringTemplate['n'] == "АПи групповой":
                self.cleanUpResult()