You may see the following warning in the Partial Multicycle section of Check Timing report when you compile a design targeting Stratix® IV GX or HardCopy® IV GX that uses Hard IP for PCI Express® in Quartus® II software version 11.1 or before.
; -from [get_keepers {*|PCIeCore_core:wrapper|altpcie_hip_pipen1b:altpcie_hip_pipen1b_inst|tl_cfg_ctl_wr}] ; Setup multicycle for this path exists but no hold multicycle was set. ;
This warning can safely be ignored since the default hold multicycle is expected on the path.
The warning is scheduled to be suppressed in a future version of Quartus II software.