Assembly material density - Neutronium?!?

[graemev]

All was going well...

Then I had to restore a backup file from the server. (As opposed to restoring from the OldVersions folder.)

Suddenly, the mass is in the millions of pounds, the volume (for a structural steel frame) fits inside a thimble, and the material approaches the density of Neutronium.

I can't override the mass property in the assembly and all the individual parts - both Content Center and my own - are using the correct mass property.

Any ideas?

[Sergio.D.Suárez]

Hi, Try to open the assembly BOM, in just parts try to add the Material tab, mass, volume. check that there is no generic material among the components. the volume of one of its components has been modified manually, try to track the component that has been modified.

On the other hand, if you have subassemblies, try to check them separately, for example, if a steel structure should have a density of the order of 7.85 g / cm ^ 3, if you find a purely steel assembly with a different density, a of your pieces should contain the problem when the property has been edited manually.
I hope you can solve your problem.
regards

[graemev]

All parts opened individually report the correct material and mass. The BoM of the assembly reports the correct materials and an appropriate mass - nothing of extreme weight. Only the assembly mass property is out of whack, it would seem, and I can't manage to override the value.

[Sergio.D.Suárez]

Its assembly seems to be built with the frame generator, if this is so,
Do you have any solids in the skeleton this configured bom structure as reference?
Does the same thing happen in the frame 001 generated by the inventor with the iproperties?

[jtylerbc · Accepted solution]

Delete the value in the Volume property, then click Update.  Inventor is seeing the volume as manually overridden (hence the hand icon shown in your screenshot of the properties), and doing weird things to the mass and density as a result. 

There probably isn't actually anything wrong with your materials.  But they are being ignored based on this assembly-level oddity.  That's why you see the correct mass if you look at individual parts, and nonsense if you look at the assembly.

[graemev]

Not sure how that happened, but that seems to have been the culprit.

Thanks!