Correct Twist of Helix
Command - Prb_ResetTwistAngle
This command will recalculate the twist angle of a profile with a helix axis.
The twist angle is what keeps a flat bar 'upright' on the helix path.
The current twist angle value can be found in the properties of the profile.
Moreover, when a profile is linked with a macro to the helix, then the macro will maintain the twist angle so that this command is not needed.
A Circular Hollow Section does not need to have a correct twist angle because the section shape is fully symmetric.