Due to a problem in the Intel® Quartus® Prime software, you may see this error mesage during the compliation of the sequencer microcode when generating the External Memory Interface UniPHY IP. This issue occurs when the PC Windows Subsystem for Linux parameter is enabled and a bash.exe process is seen in Windows Task Manager.
Device Family: Arria® V, Cyclone® V, Stratix® III, Stratix® IV, Stratix® V
Intel Software: Quartus II, Quartus Prime Standard
IP: RLDRAM II Controller with UniPHY, RLDRAM 3 UniPHY, DDR2 SDRAM Controller with UniPHY, DDR3 SDRAM Controller with UniPHY, QDR II and QDR II SRAM Controller with UniPHY, LPDDR2 SDRAM Controller with UniPHY