Techniques for error handling are described for errors detected by a computer application that receives and processes application transaction data generated by a different computer application. A determination is made as to the type of error that has been detected. Based on the determination, error correction guidance is displayed to a user for use in using the computer application that received the application transaction data to correct the error. In response to receiving an indication that the error has been corrected by the user, processing of the application transaction data by the receiving computer application is initiated.