To send error data to the target, you can define fault views in the target definition. If the transformation logic in the web service mapping sends error data to the target, the Integration Service writes messages to fault targets. Send error data to the target when you want to catch and resolve specific errors. For example, you expect the datatype of the response to be a string. If the web service workflow sends a numeric response, you can send the response to the fault target. You can then evaluate the response and resolve the error.