HELP! When I hit finish form, the form dissapears and doesnt show as a body or anything.

[serpentseye266]

I am working on a fish type model, and have finished designing my dorsal spines via creating a pipe form over my lines. However after I click "finish form" the whole spine form dissapears??? Only my sketched lines stay.

heres the link to my file: https://a360.co/3FT0Toq

[jeff_strater]

unfortunately, that link does not allow download.  If you have a commercial license, you can mark the link to "allow download".  If not, export the model as a "Fusion archive (F3D)", and attach it here.  Likely the problem is pretty simple, given that the T-Spline body looks pretty straightforward.