import in STL and export in IGES

[sunfootwear]

Hi,

I have imported a file into fusion in .stl format but now I want to export it as a .iges format, but every time I export it and save the file, there is an error. Also, the file this is exported is a few bytes in size, which doesn't make sense to me. And this .iges file, when I try to import it into fusion again, does not open. Can anyone help me as to why this is happening? Error report attached.

Thank You.

[TrippyLighting]

.stl files contain triangulated meshes. Igus files usually contain BRep geometry. I don’t think that .iges files can contain meshes. 
What do you want to do with the .iges file ?

[WHolzwarth]

Can you upload the initial STL or F3D file?