It is not a continius surface. There is some interference inside surface. With interference you can not cut surface. You have to eliminate interference.
Thank you but I do not understand. I have been following a tutorial. If you like to give me your email address, I can send the tutorial and my catpart file at your address and you can see what I have done. Since I am a beginner, I do not know how to check interference in Catia Part. It is not Catia Product.
You can upload here.
I could not upload in this discussion as I cannot find the option to upload the files. This option is available only when a question is posted initially, I think. I have reposted my question at the link:
I have added the model and the tutorial at the link. Tutorial 1-B starts at Page 28. I have sweeped the geometry as shown on Page 29 and after following further instructions, problem starts.
Thanks for guidance.