Telerik: we have investigated the issue and it seems to work fine - if you data bind another request (POST 41) it gets data values from excel file for each virtual user, so data binding of load test works fine for your site. The specific request you mention that is not data bound, there could be some problem with the request or previous GET requests that retrieve some cookies. Usually load requests should not be too much (several hundreds) as these are complex scenarios and server can return errors or ignore some important request and following requests will fail for that matter. Another thing that I mentioned is that the Workload for the single profile is set not to 100%, but 87% - workload is only used with multiple profiles and should not be reduced for single profile. There were also more than 15 think times in test with default values of 10 +-3 seconds, which means the test waits for several minutes during execution - this is also not correct for a load test - in most common case think time should be 1 +-1 second in several places of the test before POST some requests for example. Hope this information helps, closing ticket as it is working as expected. If you have additional specific queries, please use the ticketing system. Best Regards,