Customizing to use an I/O exit

FM/CICS allows you to provide a user I/O exit for use when processing data. This enables you to process records in resources which are subject to any kind of pre- or post-processing not offered directly by File Manager. See Customizing File Manager to use an I/O exit for further details about the exit.

To specify that an I/O exit can be used through the FM/CICS interface, or through the File Manager base function interface under FM/CICS, set the USEIOX option in FMN3POPT. If required, you can also provide the name of a site-specific I/O exit. For more information about USEIOX, see USEIOX. For information about changing the options in FMN3POPT, see Changing the default options. This exit name can also be overridden by the user interactively. See the File Manager for z/OS User’s Guide and Reference for information about how to use the I/O exit.