The tapered section is not visible in 3D visualisation

Th tapered section is not visible in 3 D visualization. I have attached the DXF file for end and mid section and Midas file for the same. 

Greetings.

Thanks for reaching us.

This is happening as number of nodes defining the two taper sections is not same.

It is important that 2 sections of the taper must have same number of nodes as shown below.

Secondly, deviate the vertical lines by 1mm in x-direction so that they not perfectly vertical. This might sometimes create error in forming taper.

Further, while calculating the section properties in SPC, uncheck the merge straight line options.

Kindly find the attached SPC and model file for further reference.