ICP359I TOO MANY UNIT ADDRESS RANGES ASSIGNED TO THE CHANNEL PATH ASSOCIATED WITH CHPID xx IN CSS y

Explanation

One of the following conditions exist:
  • Channel path xx in CSS y is a CBY or CVC channel path and has exceeded the maximum number of unit address ranges allowed for the channel path. The maximum number of unit address ranges for CNTLUNIT statements that attach to a CBY or CVC channel path is 64.
  • The maximum number of unit address ranges for control units that attach to shared CTC channel paths (SHARED keyword on CHPID statement) is 120. IOCP might generate more unit address ranges for control units attaching to shared CTC channel paths than for other channel path types or unshared CTC channel paths. See Shared ESCON CTC considerations for more information.
  • Channel path xx in CSS y is a spanned FC channel path (PATH keyword in the CHPID statement) and has exceeded the maximum number of unit address ranges allowed for the channel path. The maximum number of unit address ranges for CNTLUNIT statements that attach to an FC channel path is 256. IOCP might generate more unit address ranges for a spanned FC channel path than for an unspanned channel path. See FC control unit definition considerations:. CSS y is always the lowest CSS ID number for the channel path and is not the only CSS that caused the error.

System action

IOCP does not complete the generation of an IOCDS and does not produce configuration reports.

Programmer response

For a CBY or CVC channel path, reduce or consolidate the unit address ranges for CNTLUNIT statements attached to channel path xx in CSS y. For a shared CTC channel path, do one or more of the following:
  • Reduce the number of control units attached to channel path xx
  • For the devices assigned to channel path xx, reduce the number of logical partitions (LPs) in their device candidate lists (PART, PARTITION, or NOTPART keyword on IODEVICE statement). The default device candidate list for a device assigned to a shared CTC channel path contains all the LPs in the candidate list of the CTC channel path. Specify a subset of these LPs in the PART, PARTITION, or NOTPART keyword in the IODEVICE statements for each device attaching to the same control unit.
For an FC channel path, do one or more of the following:
  • Reduce the number of control units attached to channel path xx
  • Use the same link address in each CSS of a control unit for channel path xx.