I want to know the max speed of NIOS ii based on cyclone iii EP3C120N780C

Dear BadOmen:

For the JTAG Signal Constraints,I've added the following code in my .sdc file:# JTAG Signal Constraints constrain the TCK port

create_clock -name tck -period 100.000 [get_ports altera_reserved_tck]# Cut all paths to and from tck

set_clock_groups -group [get_clocks tck]# Constrain the TDI port

set_input_delay -clock tck 20.000 [get_ports altera_reserved_tdi]# Constrain the TMS port

set_input_delay -clock tck 20.000 [get_ports altera_reserved_tms]# Constrain the TDO port

set_output_delay -clock tck 20.000 [get_ports altera_reserved_tdo]

When I "Read SDC File" in the TimeQuest,It always report "Error Status" in the SDC File List.I found only this sentence cause the error:

set_clock_groups -group [get_clocks tck]

Why?

It seemed has no syntax error.

The file status turn to OK when I delete the sentence,but can not constraining the JTAG.