Control line doesn't show up in 3D view

[Anonymous]

I have problem to show up the blue control line in OpenGL Engine but if I switch to Vectorial Engine, I can see the blue control line. Can someone solve this problem? Please refer to attached images. Thanks.

[Barry Kelly]

I am not aware of any settings specifically for OpenGL.
There is a Work Environment settings to show selection contours and reference lines, but this affects OpenGl and Vectorial engines.

I would check that you have the latest video card drivers installed.

Barry.

[Anonymous]

Hi Barry, thanks for your reply. I haven't found the right answer for this problem, but I have a solution here. I saved as the model to AC 20 and re-open in AC 21, I don't have this issue anymore. I guess this may cause by the railing and stair tools as they don't show up in the new model.

[Barry Kelly]

Railings and stairs would have been deleted when you saved back to 20 as those tools don't exist in 20 and can't be replicated - so they just get deleted.
I doubt it was anything to do with them.

Sounds like it was just a glitch that got reset when saving back.
I still have no idea what it could have been.

Barry.