SDC file Warnings : Could not be matched with a pin/port

Hello,

Good Morning,

I was trying to run my project in Altera Quartus II web edition software with Cyclone III as the device. I wrote my own SDC file so that it can read it from there. However i encountered these two warnings while running the Timequest Timing Analysis :

1) create_generated_clock -duty_cycle 50.000 -multiply_by 1 -divide_by 4 -source [get_pins {pll_20to26|altpll_component|auto_generated|pll1|clk[0]}] -master_clock {clk_26mhz_in} -name {clk_leds_div4} [get_pins {leds_kitt|clk_div_4a|clk_d4}]

When i try to generate a clock in my sdc file it gives me this warning :

Warning: Ignored filter at a.sdc(17): leds_kitt|clk_div_4a|clk_d4 could not be matched with a pin

I am not sure why it can't match it to that pin/port? Could you help me where i might be going wrong?

2) Similar warning comes up when i try to set a false path :

set_false_path -from [get_ports usb0|ureg02[06]]

It again says could not be matched to a port.

Thanks a lot for your help..!