Constraint State Issue

[J.Oye]

I've attached a screenshot in regards to the issue I'm having with Inventor 2022's new constraint  state feature.  When I go into degree of freedom analysis it shows me no free degrees of freedom which is what I want.  If you look in the model tree the new constraint state feature is showing that the components are under constrained.  I can't physically move the components around so I know they are fully defined.  I have been waiting a long time in the software for some sort of visual in the model tree to know when components are fully defined.  If this new feature wasn't ready to be implemented into the software I would have hoped the developers would have spent more time getting rid of any glitches there may be and implement at a later date.

[Gabriel_Watson]

Although I agree how this should be working right off the bat in all cases (it is not that complex), I would suggest you to check if a "Rebuild All" fixes the glitch, or if enabling redundancy analysis helps prevent it from happening:
https://www.cadlinecommunity.co.uk/hc/en-us/articles/4402648575505-Inventor-2022-Constraint-status

[J.Oye]

Thing is, the rebuild/rebuild all is greyed out.  There are also some cases when model tree shows components as being under defined which is true, the components still don't move when trying to move them.

[Gabriel_Watson]

I see.
I also tend to experience those kinds of glitches more with migrated/old files. We can share some samples as it happens to help the devs here when possible.

[J.Oye]

 Here's another instance, trying to rotate the part around the axis (only constraint applied to part in model tree).  Won't allow me to rotate it.

[Gabriel_Watson]

For that, I would say the redundancy analysis can possibly prevent it from ever happening again.
Are you fully updated in 2022 Inv.?

These are some of the glitches that keep me from moving the entire team to the latest Inventor product.

[J.Oye]

Yes I'm fully updated, did that this morning when I was having the issues.  I'll check that redundancy analysis, now that you say it, remember someone else in the forum having issues with constraints.

[J.Oye]

Enabling redundancy analysis didn't have an effect at all.

[johnsonshiue]

Hi! I have seen this behavior before. It is possible there is slight geometric deviation. Or, the pre-existing constraint failures are blocking certain solutions. Please share the files here or send them (zipped) to me directly johnson.shiue@autodesk.com.

I would like to understand the behavior better.

Many thanks!

[J.Oye · Accepted solution]

Getting rid of the tangent constraints fixed the issue but still a bit annoying for a user to have to realize to use the tangent constraint sparingly because it could mess up how Inventor behaves with constraints.  Thanks a ton for your help.

[johnsonshiue]

Hi Jerry,

Many thanks for confirming the workaround! Indeed, I wish Tangent constraint would not lock up DOF in other components. When PartA is tangent to PartB, it would work better if PartA is like a leave component without being in another constraint loop. If PartA has a different constraint loop, I would avoid using Tangent constraint due to the behavior you are seeing.

Many thanks!