Draft Document for Review September 23, 2019 12:13 am 8860ch04.fm Perform the first availability function by completing these steps: 1. Click  Automatic Mapping 2. The Reset CHPID Assignments window opens with Reset choices (Figure 4-31). For the  example, select the following two options and then click  OK :  3. Click  OK  to confirm the reset (Figure 4-32). 4. Avaiability rules may differ from a 3906, so remove all CHID assignments that are still in  the IOCP.  5. Click  OK .  Figure 4-32 Reset CHPID assignments warning message Figure 4-31 Reset CHPID Assignments  – Reset CHPIDs assigned by Automatic Mapping  – Reset CHPIDs assigned by IOCP (Potential re-cabling required!) Tip:  The following fourth choice is also available, but only for an upgrade or an MES: Reset CHPIDs assigned by CMT for config files. 76  IBM z15 (8561) Configuration Setup