Using SD-Card reader on DE1 board (with Nios)

I ran into the same problem using the latest 12.0 IP for QSys:

Error (12006): Node instance "packet_memory" instantiates undefined entity "Altera_UP_SD_Card_Memory_Block"

Warning (12019): Can't analyze file -- file HostSystem/synthesis/submodules/Altera_UP_SD_Card_Memory_Block.vhd is missing

I had to manually copy the following files from the IP directory to my Qsys synthesis directory:

Altera_UP_SD_Card_Memory_Block.bsf

Altera_UP_SD_Card_Memory_Block.cmp

Altera_UP_SD_Card_Memory_Block.vhd

From:

C:\altera\12.0sp2\ip\University_Program\memory\altera_up_sd_card_avalon_interface\hdl

To:

<QsysProjectFolder>\synthesis\submodules