When I modify the path of an existing ‘Tube Feature‘ in the design model, causes any dynamic sections through the ‘Tube Feature‘ to change the display of its profile to line style 5.
The ‘Tube Feature’ tool generates the profile and path geometry using line style 5 & construction class elements. This was originally done so that you’d have geometry that could be picked to get edit handles, etc. In order to modify the path using these handles it is necessary to display these so any dynamic section will also be updated.
Open the design model and locate the ‘Tube Feature’, using the ‘Feature Manager ‘ tool select the ‘Tube Feature’
Right click on the path feature and select ‘Modify‘
In the ‘Modify Profile’ dialog that opens turn off the option ‘Display Geometry'
( Note: It may also be necessary to repeat steps 3 & 4 for the profile feature )