Trouble projecting opening to surface

Hi I have this opening that I am trying to project and it will not go on to the surface of this cube. Can someone help

Also for this problem please post a file. It’s too much of just guessing to provide help based on your screenshot…

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Hello- by default Project uses the current CPlane normal as the prolection direction, and you can set a specific direction at the command line - my guess is the direction misses the target objects.

-Pascal