How to modify helix in the CST example file

Hi

I am trying to simulate helical antenna.

I know that there is an exmaple file in CST folder.
so i want to modify it but have some problems.

first, I want to change units cm to mm.
there is no problem with it but when i simulate some error comes up.

second, In the example file helix has only 6 turns.
I want to increase number of turns to 40 or 50.
I know I can to this at property by editing angles to 40*360.
but when i modify it also error message comes up.

I want to know how to modify number of turn in helix example file and change unit cm to mm and simulate without error message.

if you know it please let me know.

thanks

hai try to design helix antenna with the help of the example file in that .....u can find history list in that example file if u go through that u can easily design.

Otherwise give save as and edit those information in the history list and save and run it will come without any error.

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