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Common Technical Question
Question R11
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Description I would like to run different versions of IOF on different ISPF split screens. How can I do this?
 
Answer Run two independent TSO sessions. Don't try to run different versions of IOF on the same TSO session.

The two sessions can easily be made to invoke different versions of IOF. Different LOGON procedures can be used, for example. See question T02 for another technique for running specific versions of IOF.

The IOF8x execs described in question T02 can not be used to initiate different versions on the same TSO session. These execs "SELECT PGM(IOFSPF)". Once the IOFSPF load module is loaded into an address space, a second call for the same load module will use the existing copy, resulting in the same version of IOF being initiated. In addition, the concatenation technique used for the SYSPROC and SYSHELP files causes both split sessions to use the same concatenation.


 

Additional
information
The IOF/TSO IOF and IOFSPF load modules are the only IOF load modules that will run from a STEPLIB or ISPLLIB. The IOF/CICS IOFCIC load module (invoked by transaction code IOF) runs from a library in the the CICS DFHRPL concatenation. All other IOF load modules (modules with names of the form IOFpvvxm) must reside in a system linklist or LPA library. See the January/February 1999 Newsletter for a more complete description of IOF load modules.
 
More Help Click here to EMAIL a problem report to IOF Technical Support for additional assistance.

 

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