A managed channel cannot have its device paths varied. If the rejected CHPID was not the one you intended, reenter the command with the desired CHPID. If the CHPID was entered as part of a range of CHPIDs, reenter the command as a series of ranges, omitting the rejected CHPID. If the CHPID is correct, then you will need to use the VARY SWITCH command to VARY the CHPID. To determine the SWITCH PORT where this CHPID is configured, use the D M=DEV(yyyy) command, specifying the device entered with the rejected CHPID to display the DEST LINK ADDRESS, pp. Then use the D M=CHP(xx) to display the SWITCH DEVICE NUMBER, ssss, of the switch device attached to the CHPID. Now by issuing the VARY SWITCH(ssss,pp),DCM=ONLINE|OFFLINE you can change the path to the desired status.