Flatten an elliptical model

Hi everyone,
I have modelled an elliptical model. I now want to make a flat pattern as a template for cutting.
When I'm trying to flatten my oval model in sheetmetal it won't work.
Is there a solution for this problem?
7 Answers

Dear CadCloud,
thank you for your answer, but I don't have inventor.
If it is possible, can you export the template for cutting in *.dwg or *.dxf File?

Finally I opened both of your files.
That solved my problem.
Thank you very much, CadCloud.
I appreciate it. I think, I should look for Inventor.
Have a nice day an best regards from north of Germany.