Unknown circular dependency

phillipJSCHJ
Enthusiast

Unknown circular dependency

phillipJSCHJ
Enthusiast
Enthusiast

In today's example of unnecessary Fusion360 bugs, this project has started kicking out circular dependency errors but doesn't provide any further information as to what is causing it. This is a line-art drawing that'll get transferred to something like Photoshop for colorizing, but today it started kicking out errors. 

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jeff_strater
Community Manager
Community Manager

the information is in the error box:

Screenshot 2023-12-28 at 4.40.15 PM.png

 

You have a dependency from "Body" to "Front Axle", and from "Front Axle" back to "Body".  Since the only references between sketches is via Project, that is always the culprit when two sketches are involved.  So, to fix it, I just did "Break Link" on the projected geometry in "Front Axle".  That fixed that one, but then revealed that there was also a cycle between "Body" and "Rear Axle", so I did the same there.  Design is attached.

 

So, one question, and one recommendation:  The question is:  How did these cycles occur?  Did you reorder the timeline at all?  Was "Body" at one time after the axle sketches?  If you can reproduce this, we can close this hole.  The recommendation is:  If you have "Auto project edges on reference" turned on in Design:

Screenshot 2023-12-28 at 4.51.05 PM.png

 

turn it off.  This setting can cause unintended projections to occur, which can cause problems.

 


Jeff Strater
Engineering Director
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davebYYPCU
Consultant
Consultant

Browser and timeline have the front axle as 2nd sketch, the dependency is between the first two sketches, 

Did you draw the axles first and then move the sketch in the timeline?

 

 

asnsi.PNG

 

After following a hunch, I got this

 

asnsi1.PNG

 

Appears you have projected the two axle files into the body sketch, and then moved the body sketch to the left.

Can't do that and get away with it.

 

Might help....

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phillipJSCHJ
Enthusiast
Enthusiast

I don't recall the exact actions, but think I see where it may have started. 

The different sections of the drawing are broken into different sketches as they'll act as movable layers in the final Photoshop file, just using Fusion to trace the source image and create the DXF line art. Exporting the DXFs didn't work yesterday for a quick check in Photoshop, tried multiple times but never got a cloud render to work. We shouldn't need to rely on the F360 cloud to kick out a DXF file, period, and I wish Fusion was less Cloud dependent for exports. 

Was just looking to quickly kick out the total drawing, but when trying to project the three Sketches into a single new Sketch, since I could save a single Sketch as a DXF, in order to keep their relative positions when importing in Photoshop is when I started getting circular errors. I don't recall trying to re-order the Sketches in the timeline, but that's when it started kicking out errors without identifying what was causing them, stating that two Sketches are the problem isn't enough info, it's helpful to know what features in the Sketch are causing this and I've seen in past posts where Fusion used to give you detailed info about what exactly is creating the Circular reference. 

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