topic Re: Broken Constraints? That are not broken? Recurring fault. in Inventor Forum

Broken Constraints? That are not broken? Recurring fault.

D0UGLAS — Thu, 22 Mar 2018 18:41:00 GMT

FOR NO APPERENT REASON IN MY DESIGN, RELATION ERRORS CROP UP?

THE DESIGN DOCTOR SHOWS THE ERRORS WHICH NEED TO BE FIXED.

REMODELLING DOES NOTHING?

WITHOUT EDITING THE RELATIONSHIP, A SIMPLE OPEN AND EDIT OF EACH RELATION FIXES THE ERROR? (SEE SCREENCAST)

I KNOW SUCH BEHAVIOUR WILL CAUSE MY CONFIGURATOR 360 MODELS TO FAIL.

THE RELATIONS EXIST IN THE MODEL FOR MANY HOURS OF REMODELLING WITHOUT ERROR.

IS THERE A LOGICAL EXPLAINATION WHY WHAT SEEM TO ME TO BE THESE NON-ERRORS, OCCUR?

Screencast will be displayed here after you click Post.

Broken Constraints? That are not broken? Recurring fault.

D0UGLAS — Thu, 22 Mar 2018 09:21:52 GMT

FOR NO APPERENT REASON IN MY DESIGN, RELATION ERRORS CROP UP?

THE DESIGN DOCTOR SHOWS THE ERRORS WHICH NEED TO BE FIXED.

REMODELLING DOES NOTHING?

WITHOUT EDITING THE RELATIONSHIP, A SIMPLE OPEN AND EDIT OF EACH RELATION FIXES THE ERROR? (SEE SCREENCAST)

I KNOW SUCH BEHAVIOUR WILL CAUSE MY CONFIGURATOR 360 MODELS TO FAIL.

THE RELATIONS EXIST IN THE MODEL FOR MANY HOURS OF REMODELLING WITHOUT ERROR.

IS THERE A LOGICAL EXPLAINATION WHY WHAT SEEM TO ME TO BE THESE NON-ERRORS, OCCUR?

Re: Broken Constraints? That are not broken? Recurring fault.

johnsonshiue — Thu, 22 Mar 2018 18:47:34 GMT

Hi Douglas,

Could you share the files here so forum experts can take a look? The video does not help debug the issue much. BTW, if possible, please refrain from typical all cap letters in your posting. It is considered yelling at people. Forum posting is like email. Mutual respect should be honored as much as possible.

Many thanks!

Re: Broken Constraints? That are not broken? Recurring fault.

D0UGLAS — Fri, 23 Mar 2018 08:06:55 GMT

Johnson

This is a very rare occurrence (the files are in use for many hours before it occurs) and as demonstrated I can fix it by opening and closing the editing, so I was hoping someone had seen it before and could provide an explantation.

I have a similar problem with a circular patter feature, occasionally I have to open and close it for it to update.

I would share the files but I think would take Autodesk many hours to recreate the error in the screencast.

When it occurs again I will save the files in the faulted state and send Autodesk a copy. (this could be weeks!)

Sorry about the caps.

Douglas

Re: Broken Constraints? That are not broken? Recurring fault.

kelly.young — Fri, 23 Mar 2018 23:41:52 GMT

Hello @D0UGLAS when you see this error, does Rebuild All have no affect?

I remember running into something similar long ago with door hinges, it might be thinking that the part is flipped around and needs clarification that it is still oriented correctly.

Can you dive into the part, update or save, and then return?

Other than rebuilding, updating, or Edit > Ok I don't know what would be causing that if the constraints are still correctly set.

Please select the Accept as Solution button if a post solves your issue or answers your question.

Re: Broken Constraints? That are not broken? Recurring fault.

D0UGLAS — Mon, 26 Mar 2018 14:46:36 GMT

Hi Kelly

It seems it is something like you describe.

Re: Broken Constraints? That are not broken? Recurring fault.

jtylerbc — Mon, 26 Mar 2018 16:23:55 GMT

Are the components with the broken constraints Parts, or Subassemblies? If Subassemblies, are they Flexible? If so, are any parts in the subassembly Grounded?

In my experience, the two most common causes of this sort of "phantom error" are Flexible Subassemblies with Grounded Parts, or some sort of unstable Adaptivity.

Re: Broken Constraints? That are not broken? Recurring fault.

kelly.young — Mon, 26 Mar 2018 17:13:36 GMT

@D0UGLAS could you try setting up a different type of constraint on one of the faces instead of a flush/mate try an angular constraint to keep it from flipping around?

It's been a while but if I remember mixing the two types helped keep it aligned without the update issue.

I agree with @jtylerbc about flexible and adaptive possibly causing issues, but I don't think you're using either of those.

Please select the Accept as Solution button if a post solves your issue or answers your question.