Why do I get recovery and removal timing violations when I use the Qsys components altera_avalon_data_pattern_generator and altera_avalon_data_pattern_checker?

Description

Due to a problem in the Quartus® II software version 12.1 SP1 and earlier, you may see recovery or removal timing violations when you use the altera_avalon_data_pattern_generator or the altera_avalon_data_pattern_checker in Qsys.

Resolution

Recovery or removal timing violations in the altera_avalon_data_pattern_generator or the altera_avalon_data_pattern_checker are safe to ignore.

This issue is scheduled to be fixed in a future release of the Quartus II software.