When a ThingWorx service executed inside Composer fails, typically the message displayed has no useful information and the user is sent to dig into the logs. Even in that case, stack tracing is not available unless the user goes on the ThingWorx server in the error log. Note that ThingWorx users at a customer site will not have access to the ThingWorx server, which may be managed by IT.
Independent of the error log, it would be of tremendous help if the stack trace is generated and displayed to the user in Composer, when the service they called manually fails.
