Simple sketch behaving irrationally(?)

[Cnoj]

Hi I've just switched to 2013SP2 (from 2010) and have come across sketch behaviour that I've never seen before.

The attached IPT has sketch geometry that refuses to have constraints added and dimensions that turn pink if any existing constraints are deleted. Oddly I can project origin planes and constrain the existing geometry to those but any attempts to constrain the two rectangles to each other fail.

I'd like to know how I can find and fix the underlying problem in the sketch.

Thanks,

Jon C.

Sketch as is:

[JDMather]

I am curious about how you end up sequencing to d900 in a sketch?

Are you migrating template or starting from new template?

[CCarreiras]

Hi!

This behavior exist in other template?

I think your template file may be corrupt.

I try the file in INV2015 and i have the same issue as you.

Try to open a different template and try to do the same thing.

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[Anonymous]

I've seen this behaviour from time to time. Not quite to the degree you're seeing, but still. I usually only see this behaviour in complex sketches though. For you to have it here and, as JD pointed out, for you to be on d900, I'd wonder if you just need a new part file. Any reason to not scrape the old one?

[Cadmanto]

Is this the same part that was originally created in 2010?  If so, what happens if you start fresh and recreate it in 2013?

I have seen strange things in the past and sometime simple recreations can fix it.

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[Cnoj]

It's likely that this template has been around for years and migrated through multiple versions.

I will try to recreate with a different template..

The IPT is a fresh one though, made 'in place' in an assy environment.

[JDMather]

I would start with fresh templates each release - but even migrated should be starting with d0.

I would not keep using something that might have accumulated some "garbage" - start fresh.

[Cnoj]

I couldn't find any templates on my machine so I used another of our default templates (these machines come pre-configured from IT with a remote template path). At least this template starts at D0.

I recreated the issue and put my steps in attached Test2.pdf

Resulting Test2.IPT also attached.

[Cnoj]

OK I tried with the two 'cross part geometry projection' Application options disabled and everything worked as expected so it seems like the turn off adaptivity and delete reference steps are causing the issue.

It still seems like I should be able to fix the resultant sketches tho..

[Anonymous]

I like your pdf.

It's tough to say why the adaptivity and projected geometry was causing the problem but it seems to me quite possible that they were.

My advice has been, is and always will be avoid adaptivity.

Glad you figured it out though.

Take care.

[Cnoj]

Well, I'd still like to know if/how I can fix the misbehaving sketch.

[Anonymous]

In this case, I don't see a way to fix it. Seems like more of a bug than a user error. It's as though when you projected and then deleted the referenced geometry, some piece of it stayed but doesn't become apparent/problematic until you try to constrain the two boxes together. If it is a bug, I will have a very difficult time explaining it lol.

If you run in to something like this again, I'd start the part over and go about it differently.

I don't believe there is a way to correct the behaviour with the same geometry.

[4donwan4]

I read the posts to this thread and I would agree with the many who feel the file is corrupted. Can't give you any explaination as to why this might have happened. If the project files workspace was pointint to network drive its possible it may have been corrupted saving to the network drive. Just a possible example.

Regards,

Don

[Cnoj]

I finally found the default (as shipped with inventor) templates and recreated the issue using all new part, assy and project files and a different PC.

[johnsonshiue]

Hi! The behavior is not right. It does look like constraint corruption issue. Are you able to reproduce it from scratch? If yes, could you show me the steps?

Many thanks!

[Cnoj]

Sure, here's exactly what I just tried. Pretty much the same as in the PDF posted..

With both App. Options>Sketch>Cross part geometry projection options checked:

-Create two new IPTs, just blocks with two holes in each.

-Put them in a new IAM with hole'd surfaces constrained flush.

-Create In-Place Component (I left 'Constrain sketch..' checked) 

-Project the geometry of the four holes into the sketch in this new part.

-Finish sketch

-Return 

-Turn off adaptivity in new part and it's sketch.

-Open new part

-Edit the sketch and draw rectangles using the projected circles as corner points.

-Delete the references in the browser tree under the sketch branch to remove the circles.

-You should now have 2 misbehaving rectangles in the sketch.

Rectangles after being dragged around a bit:

[johnsonshiue]

Hi! This is a great catch! The workflow you demonstrates here confirms my suspicion that some reference flag was not cleared out properly after the source geometry is deleted. I am able to reproduce the behavior now. I am sending it to development for further review.

Many thanks!