Getting execution error in HFSS

Hi,
I have to analysis a mode selector which has three modes TE01, TE02, TE03. Can anyone suggest whats steps to be followed to get the result without an error?
My Input signal frequency for mode selector is 42GHz. I have designed and executed it. But iam getting message "Analysis completed with some execution error".
What I have to do to remove this?

I am encountering the same error. I have 8 patch antennas mounted on the cylindrical surface. I am feeding them using stripline structure and there are 3 substrate layers. two for the striplines and third , on which the antennas are wrapped around. I am seeing this error. Unexpected error encountered in the meshing process''.How can I remove it?

These errors generally suggest something isn't set up quite right in your project. I suggest you contact your local ANSYS AE, and have them look at the project. If nothing else, then you need to post MUCH more detailed information here on the project and the error.

Thanks for your suggestion sweet jimmy