Autodesk - Is this a know BUG?

[Rich.O.3d]

UNFOLD seems bugy as hell

I have parts that randomly stop computing...i can have these parts working for days, then suddenly one morning...fail fail fail !

The top level assembly has been rebuilt many times over several days without issue, then randomly (or what appears to be random, i cant find a procedure that reproduces the issue consistenly) it fails.

Inventor 2012 SP2 (from plant design suite 2012 ultimate)

[Rich.O.3d]

far out...its enough to send you nuts

couple of restarts later...no other changes

kablamy...computes

well not quite kablamy

I have to open each of the offending parts individually and rebuild twice

or drag the eop up to the unfold then edit it then accept ....

[JDMather · Accepted solution]

I noticed that you have Extruded features before the Unfold rather than sheet metal features.

Can you attach the file here?
Why are you using Extrusions to create the part?

[stevec781]

This has been explained somewhere else here - I forget where.  The preview uses a different less accurate alogorithm so sometimes you can get a preview but when you hit ok the more accurate algorithm fails.  Same happens when trying to apply a FG member to a spline, it previews but wont create it.  Also for complex sweeps.  Fast preview but really slow creation.

[Rich.O.3d]

been soooo busy...just got back to fixing these.

Once I converted the extrusions to sheet metal faces and thickenses! (using same sketches etc etc) the compute error seems to have disapeared...much more stable now.

I should have know better, but when under the pump, sometimes bad habits form.

Cheers for the Heads Up JD