Activating TRANSMIT and RECEIVE

Perform the following steps to activate TRANSMIT and RECEIVE:

If TRANSMIT and RECEIVE are not already in your tables of authorized commands, add them. Use SYS1.PARMLIB member IKJTSO00 to authorize commands. For more information about using IKJTSO00 to add authorized commands, see Specifying authorized commands/programs, and commands not supported in the background. You can also add them to the tables in CSECTs IKJEFTE2 and IKJEFTE8.
Specify defaults for the TRANSMIT and RECEIVE commands in member IKJTSO00, copied from SYS1.SAMPLIB to SYS1.PARMLIB, or in CSECT INMXPARM. If you choose to use an existing version of INMXPARM, you must reinstall and reassemble it. For more information, see Setting up the TRANSMIT and RECEIVE environment.
If you use JES2, you must specify the JES2 initialization parameter TSUCLASS OUTPUT=YES. Otherwise, the TRANSMIT command will not work because the SYSOUT data from the TRANSMIT command will be deleted.
JES2, JES3, and MVS™ are unaware that data sets being routed among nodes in a network are in transit to other nodes. Consequently, data sets are not checked for valid destinations during transmission. Check periodically for invalid destinations.
If you have JES2, you can do either of the following steps:
- Use the $DF command to list all data sets in transit, and then use the RECEIVE command with the USERID parameter to delete or reroute data sets with invalid destinations.
- Use JES2 exit 13, the TSO/E TRANSMIT and RECEIVE screening and notification exit, to check for invalid destinations. See for information about that exit.
If you have JES3, you can use exit IATUX42 to check for invalid destinations. See for information about that exit.
You can alter the limit on punch-card output for TSO/E sessions, which governs the size of a data set a TSO/E user can send using the TRANSMIT command, using the JES2 parameter ESTPUN (for FMID HJE1367 or later). Either:
- Set ESTPUN to a high value to avoid D37 ABENDs when the TRANSMIT command is used, or
- Use IKJTSO00 or INMXPARM to control output limits, as described in Specifying authorized commands/programs, and commands not supported in the background and Setting up the TRANSMIT and RECEIVE environment.
If your installation wants users to be notified when transmitted data arrives, you must use either RECEIVE exit INMRZ05R, exit 13 for JES2, or exit IATUX42 for JES3. If there is no exit routine, JES does not notify the user receiving the data.