problems with inventor 2021

[pquenzi]

I recently switched from Inventor 2018 with Simulation Mechanical to Inventor 2021 with Nastran. I was very happy with 2018 and Sim Mech. Not so with 2021. Today while working on an assembly in 2021 I found I could not create a new work plane from one of the origin planes. When I would type in the offset it would place the new work plane coincident with the origin plane not at the desired offset. Later on I find missing lines in the idw of a model that I could find no way to make visible. Constraints seem to be much more likely to jump over center to the unwanted position than in 2018, both angular and mate constraints. At first I was just thinking these problems were due to my not knowing how to use the latest features, but I don't think that is the case any longer. Have any others noticed these things and does anyone have any suggestions on how to work around or eliminate these issues? Thank you. Phil

[JDMather]

I don’t recall ever seeing these issues.

When you see an issue you should Attach the file (or a dummy) that exhibits the same behavior.

[jtylerbc]

I made an almost identical jump (2018-2021), and have not seen any of the issues you are describing.

To be fair, our update is relatively recent, and I've been stuck doing a lot of administrative and training-related work instead of doing actual Inventor-based design work since then.   But I feel like I have used it enough that I would have seen at least some of what you are describing if they were common occurrences in 2021.

Did you install all of the updates that are available for 2021?  What about your graphics drivers - are they up to date?

[pquenzi]

I have update 2021.3 installed and I just updated my graphics driver from the Nvidia web site but still have at least one of the problems: missing lines in the idw views. I have tried the views with tangent edges both on and off and with interference edges on and off. The lines are all there when the view is updating, but as soon as the updating is done some lines disappear. Not sure what interference edges are, but I assume it has something to do with raster views because it takes a long time for the view to update when it is checked but the end results are the same. When I make an idw of the individual part in which the lines were missing in the assembly all lines show up just fine. I did not see any setting in application options>drawing that seemed like it would help. I tried checking and unchecking "display line weights" but that did not make any difference. I will see what happens as I make additional drawings to see if maybe the problem is just with that particular assembly. Any other suggestions appreciated. Phil

One more thing. The missing lines belong to a part that appears in several places in the assembly, but the missing lines are only in one or two of the parts and not in all views.

[pquenzi]

view with the missing lines.

[johnsonshiue]

Hi! I don't believe the issue is graphics related. It is usually geometry related. For performance boosting, certain view edges are consolidated or removed. Sometimes, it can be overly aggressive. Or, the geometry is in borderline poor quality and it cannot be presented properly.

Usually, there is a way to make it work by splitting faces or reorient the model. Please share the files here or send them to me directly johnson.shiue@autodesk.com. 

Many thanks!

[pquenzi · Accepted solution]

Yes, I think you are correct. Here is a screen shot with the steering at a 0.25 degree angle  from straight ahead and the missing lines reappear. I won't bother sending you the files as long as I know what is going on. It also seems like it is overly aggressive on constraints causing them to snap to the unwanted position more often than it did in 2018 when a constraint is driven to a near over center point. Thanks for the help. Phil