Bulk undo bug

[rhasell]

So today I got hit with the undo bug. It has been mentioned on Reddit, but I ignored it.

Well today, I tried to undo a task, and instead of undoing the last command, Inventor managed to undo about 20 commands in one go.

There is no redo option, all the work is just gone!

[johnsonshiue]

Hi Reg,

I guess you are editing a Model State and then you were activating different Model States in between. The issue with this workflow is that activating each Model State is more like editing a different document (a mini doc within the doc). Certain transactions may be limited to the particular Model State. If you might be able to see the same behaviors when editing multiple documents.

I think this is a bug and a limitation. If you find a way to reproduce the behavior, please let me know.

Many thanks!

[rhasell]

Hi Johnson

I should have elaborated a bit more. I was busy with a drawing at the time.

- I was using a dummy drawing to do a "Replace Model References"

= Copied a view to my main drawing

- Went back to the dummy to replace references again

- Replaced the model.

- Made a mistake, so I pressed the undo. However this is where the error might have arisen

- There were orphaned items at the time of pressing the undo button. Due to the model change, some geometry was slightly different and I did not clean it up before pressing undo. (I normally clean the view before doing anything)

- The undo then rolled back to the last save point.

One additional thing, Inventor was pretty much broken after this. I had to restart, as the relevant IPT and IAM files were missing from the file browser. (Insert panic here) After the restart everything worked just fine. I had lost all work done on the drawing, but at least the files were still present on the disk, and there was no corruption.

I did not do anything different after that and continued with the same workflow of using the dummy drawing to create new views. I just cleaned the views up before copying them.

I was partly to blame for this error, as working with unresolved orphaned items is not the smartest thing to do.

[johnsonshiue]

Hi Reg,

No, I don't think you did anything wrong. But I suspect this has something to do with how Inventor Undo stream is managed. Unlike AutoCAD, Inventor Undo stream goes across multiple documents. It is natural because the related Inventor documents are all linked. You don't edit a design in isolation. More than likely multiple documents are edited at the same time and sequential operations are performed.

However, the Undo is a series of operations across documents. This gets tricky, particularly when one of the documents need to be saved.

If you happen to find a way to reproduce it, please let me know asap. It could be a bug or a limitation.

Many thanks!

[spencer]

I have it happen often and it usually revolving around flat patterns, I have a reproducible example when going from multibody parts to components and making flat patterns

So start with a multibody sheet metal

Make components on the parts, with an assembly

Open each part in the new assembly

Assign A-Side and create flat pattern (These operations also won't appear in the undo history, which I assume is the core of the problem)

For good measure, add a cut or mark or something to one of the parts and they still don't appear in the undo history

Next time undo is pressed, Inventor pulls all the way back to the last thing in the history, which in this case will be the original creation of the assembly with the derived parts.

[jschneiderX3R4T]

When is this going to get fixed? It is overly frustrating working on a drawing for 20+ minutes only to have it completely wiped by an undo button that works at random.