Fusion awfully slow on a seemingly very simple opération

[Le_Bear]

I created a very simple component (1 sketch, 1 extrude) from a more complexe one.  In that original model, Fusion behave at a normal speed.

Now, I export that component to another folder.
There, I load the part in order to modify the sketch. A very simple command, like dimension, make Fusion becomes terribly slow, black part of the screen for more than a minute. I have to precise the complex part is closed at that time.

Here is what tasks manager looks like when this happen

Fusion has been "thinking", and still is, for the time I composed this message. Looks like something is wrong...

[g-andresen]

Hi,

Please share the file and mark the sketch & corresponding body

File > Export > save as f3d locally > attach to next post

günther

[jeff_strater]

if dimension is taking a long time, then most probably the sketch you are working on is not "simple" at all.  As @g-andresen requested, please share your model here - without that, we are shooting in the dark.

[Le_Bear]

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@jeff_strater wrote:

if dimension is taking a long time, then most probably the sketch you are working on is not "simple" at all.  As @g-andresen requested, please share your model here - without that, we are shooting in the dark.

---

I am sorry; Jeff, but IT IS simple !
It's not just dimensions, by the way, it's EVERYTHING . Just "edit sketch" takes forever.

[Le_Bear]

Here is the file in question:

[g-andresen]

Hi,

With me the attempt to edit the sketch ended several times with a crash.
But I was able to create a new sketch and take over the contour of the body via projection without link.
But the sketch contains a lot of problems, so I would create it new instead of trying to repair it.

günther

[TheCADWhisperer]

Sketch Issues

I will Attach video when it is done compiling - demonstrating the biggest issue in the sketch.

[TheCADWhisperer]

807ef738-4f3d-4c02-b13d-7493a24a29a2,640,620

[TheCADWhisperer]

Well, embedding Screencast only works half the time for me.

>>https://autode.sk/2Dv3AQv<<

Here is direct link.

[jeff_strater]

yes, @Le_Bear , you are right.  This is a simple sketch, and it does hang on sketch edit.  From the crash traceback, it seems to be stuck in trying to draw the sketch grid.  If the grid is off by default, this is not a problem.  Most likely, there is some bad sketch entity in here that is hosing the grid computations.  Because sketch grid is a user setting, not a document setting, you can:

1. create a new design
2. create a sketch
3. turn off the sketch grid in the grid palette
4. exit sketch
5. close this design

This will turn off the grid by default.  You can edit the sketch then, and dimension.

However, please pay attention to all the other good advice here - these are valid suggestions to improve the design (and avoid this bug)

I created FUS-70428 to track this hang issue.  Thanks for reporting it, and keeping me honest!

[Le_Bear]

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@jeff_strater wrote:

yes, @Le_Bear , you are right.  This is a simple sketch, and it does hang on sketch edit.  From the crash traceback, it seems to be stuck in trying to draw the sketch grid.  If the grid is off by default, this is not a problem.  Most likely, there is some bad sketch entity in here that is hosing the grid computations.  Because sketch grid is a user setting, not a document setting, you can:

1. create a new design
2. create a sketch
3. turn off the sketch grid in the grid palette
4. exit sketch
5. close this design

This will turn off the grid by default.  You can edit the sketch then, and dimension.

However, please pay attention to all the other good advice here - these are valid suggestions to improve the design (and avoid this bug)

I created FUS-70428 to track this hang issue.  Thanks for reporting it, and keeping me honest!

---

I guess my post was not fully understood. I am not asking for help, I am reporting what I believe is abnormal, to not say a bug. 
This has been created from another assembly, and exported. In the original location, everything works normally. It's ONLY the export which has a problem. So, for me, it has nothing to do with the sketch, the grid, or whatever. It has to do which the export, which might be losing some references, and make it so prone to crashes.

Here is the original, in context :