CCOpt CTS **ERROR: (IMPCCOPT-2004): Cannot run CCOpt as no clock trees are defined.

[pskol95]

Hello everyone,
I am facing this issues in ccopt based cts as shown in picture.
I have inserted IO pads in my design before "init_design" itself.
What am I doing wrong ?

 

[ThisIsNotSam]

the tool did not find any clocks, that simple. do you have any defined in your sdc?

 

[pskol95]

the tool did not find any clocks, that simple. do you have any defined in your sdc?

Yes, I have "create_clock" command in sdc.

 

[ThisIsNotSam]

try report_clocks, it will tell you whether you really have properly defined clocks

 

[pskol95]

try report_clocks, it will tell you whether you really have properly defined clocks

After IO pad insertion, I replace clk with top level clk_io in sdc.
I got this after report_clocks

 

[ThisIsNotSam]

nothing suspicious there. maybe the IO connection is not done properly? I assume the IO has some in/out port and some config bits that you have to set. If, by mistake, you configured the clock IO as an output, it could create a weird behavior like what you are describing. double check that.

 

[pskol95]

nothing suspicious there. maybe the IO connection is not done properly? I assume the IO has some in/out port and some config bits that you have to set. If, by mistake, you configured the clock IO as an output, it could create a weird behavior like what you are describing. double check that.

Thanks alot Sir,
Connection were okay, but a .lib which has timing info about pads were missing, that was causing problems.