You may see the following warning in the Setup/Hold Multicycle Consistency section of the Check Timing report when you compile a design targeting Stratix® IV GX or HardCopy® IV GX device families that contains a Hard IP for PCI Express® in Quartus® II software version 11.1 or before. The multicycle constraint is included in the SDC file for the Hard IP block.
; -from [get_keepers {*|PCIeCore_core:wrapper|altpcie_hip_pipen1b:altpcie_hip_pipen1b_inst|tl_cfg_ctl[*]}] ; Setup multicycle for this path is same as hold multicycle.
The warning can safely be ignored since those constraints have the same setup and hold multicycle values by design.
The warning is scheduled to be suppressed in a future version of Quartus II software.