Sketcher broke, and can't revert to previous version

[Noah_Katz]

No screencast audio because of background noise.

The sketcher seems to have broken in this design; when I try to constrain an unconstrained line it tells me it will be overconstrained.

Then when I tried to revert to the previously saved version, I couldn't.

I tried following the help instructions but when I hover near the folder icon the icon that's supposed to appear doesn't.  

Link to design: https://a360.co/3AarKZu

[Phil.E]

The design is not downloading for me. Can you possibly attach it here?

[jeff_strater]

Aslo, I don't see a screencast here.  If you are having problems with inserting it, just share the link here.  Thanks.

[Noah_Katz]

I tried exporting the design as an .f3z, but it failed after 15 min.

Finally found the darn .f3d after waiting 15 min for search to complete; attached.

The screencast showed in the post preview, not sure why it didn't appear, but the link is https://autode.sk/33v1mgT

I tried to search my computer for the .f3d but only two out of dozens came 

[TheCADWhisperer]

Open your file.

If the component in question is external - make it local.

File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

If the sketch in your screencast is a single sketch - it is far far far too complicated.

Use several small sketches rather than one large sketch.

Most Fillets should be done as placed features rather than in sketch.

[Noah_Katz]

??

> If the component in question is external - make it local.

What component? The problem is in sketch mode.

> File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

It's attached to my previous post.

[TheCADWhisperer]

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@Noah_Katz wrote:

What component? The problem is in sketch mode.

---

A sketch can only be created in a Component (either at top level or sub-component).

[Noah_Katz]

Ah; it's an internal component.

Even if it wasn't, not sure how that could explain the problem suddenly occurring after having edited the sketch hundreds of times before.

[TheCADWhisperer]

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@Noah_Katz wrote:

Ah; it's an internal component.

Be careful doing this if you are not sure -

Can you save a copy of the file, delete all of the extraneous stuff and Attach the cleaned up file here? (Only interested in the sketch in problem statement.)

[Noah_Katz]

OK, attached.

The problem isn't as bad now.

I still couldn't change the rightmost vertical line's dimension to Driving, but it did let me create a new one and dimension it, which I couldn't do before deleting the rest of the design.

Are model files still called designs?

I really dislike that terminology because it creates confusion when you want to refer to a design.

If you're not sure what I'm saying, I rest my case.

[TheCADWhisperer]

From my experience - this should be at least 3-5 separate sketches.

I would expect to have issues with a sketch like this (in any parametric MCAD software).

[Noah_Katz]

I know that now but this was one of my first projects and I didn't learn that out until I was deep into it with dozens of parts and joints.

I understand that big sketches kill performance but not why it would make sketching malfunction.