Usage Notes

On return from the installation exit, IATSIWO will use only the routing code selected by the installation exit.

Registers 0 to 14 must be restored on exit.

If your exit routine selects more than one routing code, makes an incorrect selection, or does not supply a routing code when a return code indicates that one has been specified, then IATSIWO will select a routing code based on the original routing codes using the algorithm shown in Table 1.