multi-profile part design sweep undesired result

[KAKM]

I was trying to make a multi-profile sweep in part design to be used as part of a fluid path (it's ultimately going to be exported as an IGES file to be used in Star-CCM+, if that matters), and it seems the sweep algorithm does not want to produce the shape I need. Essentially, I need a constant 2" square cross section running between the two square sketches, and then a smooth transition from a 2" square cross section to a 2" circular cross section. The sketches look like this:

Screen Shot 2021-12-03 at 3.28.07 PM.png (30.63 KiB) Viewed 870 times

and what I got from the sweep was this:

Screen Shot 2021-12-03 at 3.28.51 PM.png (119.53 KiB) Viewed 870 times

I'm guessing that it's because the sweep algorithm doesn't like the "corner" between the constant profile and varying profile sections. What is the recommended method for dealing with this?

OS: macOS 10.15
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: (HEAD detached at 0.19.2)
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: C/Default (C)

[Shalmeneser]

Pipe + Loft ?

[KAKM]

Thanks! How was the square cross section referenced for the loft? There's no (square) sketch listed under the loft dependencies–did you have to have the end profile of the pipe selected when you opened the loft tool?

[Shalmeneser]

Thanks! How was the square cross section referenced for the loft? There's no (square) sketch listed under the loft dependencies–did you have to have the end profile of the pipe selected when you opened the loft tool?

Sketch002 is used twice : once for the Pipe, once for the Loft.
A sketch can used multi-time.
I do not use all the Sketch001 for path, just some edges.