topic Re: Bug in "Manage Lost Projections" in Fusion Design, Validate & Document Forum

Bug in "Manage Lost Projections"

matt.gstaff — Mon, 13 Apr 2020 22:34:07 GMT

The interface for Manage Lost Projections has some issues.
This happens occasionally:
I edited some features upstream, removing a face that was projected in a sketch. Of course this created an error, but when I use Manage Lost Projections to delete the geometry, it fails. Pressing the button or using the "delete all" option, break link, etc. does not work and the red outline and sketch error persists.
There is no other way to delete this phantom geometry. I must simply accept the warning for the sketch or completely remake the sketch and repair inevitable downstream errors.

Secondly, I'd like to mention that the Manage Lost Projections interface should allow "re-re-linking" of successfully (but improperly) re-linked geometry. Simply don't grey out the "re-link" button after I successfully re-link geometry. in the current state, if I re-link to the wrong line/face/etc., I have to close out of the interface and reopen it, losing whatever progress I had made.

Thanks

Re: Bug in "Manage Lost Projections"

TrippyLighting — Tue, 14 Apr 2020 00:32:11 GMT

Can you share your design ( link to it from the data panel )?

Re: Bug in "Manage Lost Projections"

evilc — Tue, 26 May 2020 21:23:12 GMT

I am getting this issue too

Here is a project which exhibits this issue:

https://a360.co/2B7U1pj

To repro the bug:

Delete the extrude that is named "DELETE THIS TO CAUSE BUG" (6th extrude)
The sketch "VTx holder" will then have a lost projection
Try to delete the lost projection using the tool, it will not delete
Also notice that if you go into that sketch BEFORE you delete the extrude, there is no projection
There USED to be a projection, but I deleted it, so it seems that the bug is something to do with deleted projections not properly being deleted

Re: Bug in "Manage Lost Projections"

evilc — Tue, 26 May 2020 21:35:09 GMT

Update:

I think I may know what causes it.

I projected a face into a sketch.

I then deleted all but one of the lines that made up the face.

Later, I then deleted the remaining line that made up the face, leaving no elements of the face in the sketch

However it still thinks the face is projected into the sketch

Re: Bug in "Manage Lost Projections"

evilc — Tue, 26 May 2020 22:02:53 GMT

Confirmed, it's VERY simple to repro this bug

Create a sketch
Draw a rectangle
Extrude the rectangle
create another sketch on a plane perpendicular to the first sketch
Project the face of the extruded rectangle into the sketch - use one of the faces that is perpendicular to the sketch, such that only two lines are projected
Save sketch
Edit the second sketch, delete all projections
Save sketch
Delete the extrusion
Bug occurs - second sketch has un-deletable lost projections

Basically, as far as I can tell, the issue is caused because you project a face of four sides, but because the sketch is perpendicular to the object, only two lines get projected (All good so far).

I guess there is some code that works out whether the face has been deleted, but it checks whether FOUR lines were deleted, when only TWO ever existed.

Re: Bug in "Manage Lost Projections"

evilc — Tue, 26 May 2020 22:04:00 GMT

Grr, having issues pasting in the screencast

https://autode.sk/2LYzbdR

Re: Bug in "Manage Lost Projections"

evilc — Wed, 27 May 2020 01:12:34 GMT

Found a workaround

Redefine the sketch plane and the lost projections disappear

Re: Bug in "Manage Lost Projections"

Anonymous — Sun, 22 Aug 2021 06:57:33 GMT

Thank you for the redefine-sketch-plane workaround. I'm a newbie with very simple models and I'm hitting this bug all the time. I hope it gets fixed.

Re: Bug in "Manage Lost Projections"

davebYYPCU — Sun, 22 Aug 2021 07:42:55 GMT

Quick fix,

delete sketch 2, before you delete the body.

Re: Bug in "Manage Lost Projections"

TrippyLighting — Sun, 22 Aug 2021 15:44:38 GMT

I cannot speak to the OP's model, but what user @evilc is describing is not a bug.

He simply has not paid attention to what the warning message actually says. When the extrusion is deleted, what is lost is the sketch plane. At least following his screencast and the verbal description.

Re: Bug in "Manage Lost Projections"

vojnar — Sat, 29 Jan 2022 06:21:50 GMT

I resurrected this topic, sorry.

I can confirm this bug. It happened to me now. I resolved lost projections the same way but warning is still there.

Reproduction steps are the same but sketch plane is not the object face so it will exist.

I think, These bug warnings are these two named "Project1" and "Project2" under the warning you mentioned (that one will not be present). My sketch with bugs had different projections of course but I can recreate this bug with a little modification I mentioned.

Re: Bug in "Manage Lost Projections"

vojnar — Sat, 29 Jan 2022 06:19:18 GMT

You actually "solved" this bug using another old not resolved bug. Cool! 🤣

..but not so cool 😭 because I hate these two bugs a lot!

Re: Bug in "Manage Lost Projections"

TrippyLighting — Sat, 29 Jan 2022 07:03:24 GMT

There is no resurrection without a model 😉

Re: Bug in "Manage Lost Projections"

vojnar — Sat, 29 Jan 2022 23:45:56 GMT

This bug is so apparent and you still need us (we users) to work for you and demonstrate it even when you can do it easily in less than 5 minutes alone. I had to install Screencast that even do not work correctly for my HiDPI setup and lost half an hour of my time. Happy to help 😶

Re: Bug in "Manage Lost Projections"

vojnar — Sat, 29 Jan 2022 23:54:09 GMT

A simple demonstration of the bug... It is not possible to remove warning from the sketch without use of another bug (for example, by use of redefining sketch plane bug to destroy projection links).

EDIT: Selected screencast appearently was not included into a post.
https://autode.sk/3g8SMXX

Re: Bug in "Manage Lost Projections"

davebYYPCU — Sat, 29 Jan 2022 23:55:16 GMT

No, we need your file to see what you did to make these errors,

and seeing there are no clues, breaking sketch 2, is hardly a bug, just user error.

Might help....

Re: Bug in "Manage Lost Projections"

TrippyLighting — Sun, 30 Jan 2022 00:00:38 GMT

1. As an Autodesk Expert Elite, I am a customer, not an Autodesk Employee.

2. I don't see a bug in your file. If you delete the object you sketched on, then a warning will appear in the timeline. The correct action would be to use the undo button and not ignore the warning. If you don't have the wherewithal to do so and ignore the warning that isn't a problem with the software, that is a user error.

The warning is 100% accurate. You deleted a face that was used to sketch on.

Re: Bug in "Manage Lost Projections"

laughingcreek — Sun, 30 Jan 2022 00:08:58 GMT

I'm not sure I would completely agree with you on that trippy. If I see an error in a sketch, I would expect to be able to use the lost projections dialog to clear that error. I'm mean, what if after creating the sketch, I realize I don't need that extrude or the line projected from it and want to delete it? I have to remember to go delete the line from the sketch before deleting the extrude? and if I don't catch the error immediately I have to delete the entire sketch and make a new one just to clear the error? no, "manage lost projections" should be able to clear something like this, IMHO.

Re: Bug in "Manage Lost Projections"

vojnar — Sun, 30 Jan 2022 00:17:14 GMT

Sorry, I thought you are an Autodesk employee or someone who manages these topics. I am still new here.

Sketch 2 is not broken, just the link is lost and can be assigned again, removed or the projected object can be deleted. This is not a user error but inevitable action when you refactor or modify a project. Yes, I deleted the extrusion but this can happen even when you edit some parameter value and this problem can not be solved without an option to repair or delete a link. I solved this by selecting "delete projected object" but the warning is still here but the problem is solved with dialog made for this situation. Fusion 360 still thinks there is a problem even when the problem does not exist. Apparently, this problem can't be solved even when there is a dialog to do it. Simply...

Expected action by selecting "delete projected object" - the projected object is deleted and the broken link is solved and no warning anymore.

What happened was that I chose "delete projected object" - the broken link doesn't exist anymore but the warning is still here and can't be resolved.

Re: Bug in "Manage Lost Projections"

TrippyLighting — Sun, 30 Jan 2022 00:17:00 GMT

@laughingcreek good point, that behavior can certainly be improved!

I am not even sure this is recognized as a bug. I don't see any participation of AD in this thread. @Phil.E @jeff_strater could you look at this?