Critical warning

[Altera_Forum]

Hi everybody, I read the similar subject here but I didn't find the solution of my problem. 

 I have an image processing project, I'm sure that there isn't any error in algorithm and files which I added to project. But when I loaded .sof file to Cyclone II, it's written there is no signal at the screen. what can be the reason of this problem? When I compiled project, there isn't any error but there is Critical Warning: Time Requirements not Met. I think maybe problem is sourced from this warning and I have to add .sdc file.. what do you think about this?

[Altera_Forum]

If you are sure your project files are correct, then your problem could come from timing. You should at least declare your input clock frequencies and the input/output timing requirements. Have a look at this user guide (http://www.alterawiki.com/wiki/timequest_user_guide).