i use mk_taget_board cmd to creat my custome board ,but it appears this error.
software verson 5.1
enter the cmd in NIOS II SDK SHELL：
[SOPC Builder]$ mk_target_board --name=Hard_Board_2c5 --family=CycloneII
--clock=22.1184 --index=1
--buffer_size=2048
--class=name=Hard_Board_CycloneII_2c5
--epcs=U6
output the results in screen：
Make Target Board version 1.01
Switch summary:
Board name: "Hard_Board_2c5"
Board class: Hard_Board_CycloneII_2c5
Device family: "Cyclone II"
Clock frequency: 22118400hz
Payload buffer size: 2048 bytes
EPCS flash enabled with reference designator:U6
ERROR:
c:/altera/kits/nios2_51/bin/
create-board.pl 1279 CALLED (main)
c:/altera/kits/nios2_51/bin/
create-board.pl 99 CALLED (cb_setup_directories)
c:/altera/kits/nios2_51/bin/
create-board.pl 511 CALLED(europa_utils::find_component_dir)
/cygdrive/c/altera/quartus51/sopc_builder/bin/europa/europa_utils.pm 2030 CALLED
(europa_utils::ensure_class_ptfs)WHERE
‘get_class_ptg and ensure_class_ptfs must be called with g{system_directory}’OCCURRED on
/cygdrive/c/altera/quartus51/sopc_builder/bin/europa/europa_utils.pm 1923
