Why are OCT nodes listed at No Clock section in the Check Timing report in the TimeQuest timing analyzer?

Description

In the Quartus® II software, the Check Timing report in the TimeQuest Timing analyzer may list the following on-chip termination (OCT) nodes in the No Clock section for designs targeting Stratix® IV devices and using DDR3 SDRAM Controller MegaCore®  supporting UniPHY:

<hierarchical path>|altera_mem_if_oct_stratixiv:oct0|wire_sd1a_terminationcontrol[0]
<hierarchical path>|altera_mem_if_oct_stratixiv:oct0|wire_sd1a_serializerenableout[0]

Resolution

These warnings can safely be ignored.