topic Re: Cyclic dependency on sketch exit in Inventor Forum

Cyclic dependency on sketch exit

Anonymous — Thu, 04 Nov 2021 18:11:26 GMT

I have a sketch for a sketch-driven pattern in which are only driven dimensions and parameters.

The sketch-driven pattern is currently below my EOP.

When I attempt to exit the sketch, the "A cyclical constraint dependency was detected" error activates, preventing me from exiting the sketch. All dimensions, as I mentioned, are either linked to a parameter with a static number input, or are based on driven dimensions within the sketch.

Anyone have any ideas?

Re: Cyclic dependency on sketch exit

Anonymous — Thu, 04 Nov 2021 19:24:51 GMT

Attached is the model that is giving problems.

To recreate the error, edit Sketch12 and delete the point circled here.

If the EOP marker is placed above the sketch-driven pattern and below Sketch12, no error occurs.

When the EOP is moved below the pattern, the error appears.

Thanks.

Re: Cyclic dependency on sketch exit

johnsonshiue — Thu, 04 Nov 2021 19:55:55 GMT

Hi! As I mentioned in the other thread, this sounds like a corruption to me. The error indicates that some parent objects depend on children objects. For example, a dimension is between a line with a sketch and a projected edge from a downstream feature. This should not have happened.

It is possible it used to crash during a workflow but the crash has been fixed. The corruption is tolerated. Please share the file here or send it to me directly johnson.shiue@autodesk.com. I can take a look and see where the problem is.

In the meantime, you may try moving EOP to as high as possible. This can tell which particular sketch has the bad relationship. Then edit the sketch and delete some dimensions (driven).

Many thanks!