The Web error program DFHWBEP receives a list of parameters containing error information, and a block of storage containing the default HTTP response to send to the Web client. The program can use or modify the default response, or create and send its own response using the EXEC CICS WEB and DOCUMENT API commands.
The error information passed to DFHWBEP includes an HTTP status code, an error code, abend code, message number, response and reason codes, and the name of the program where the error has occurred. You can modify all the items in the error response.
Refer to IBM's CICS Transaction Server documentation for guidelines and recommendations on how to use DFHWBEP, and descriptions of the input and output parameters it uses.