topic BOM item override in Inventor Forum

BOM item override

Bert_Bimmel — Tue, 30 Jan 2024 11:02:57 GMT

Hello everybody!

May somebody explain to me what's the deal with the new BOM item-overrides?
Formerly (Inventor 2020), the item-Property of each BOM row was not associative to anything. The initial automatic population was done arbitrarily, and every manual change was pari passu:

There was no such property as "overridden" in the API either:

Now, when I open the same assembly in Inventor 2024, some item Numbers are marked as overridden:

Still, there's no property called "overridden" in the API, and no "unoverride" method, and the common workflow to unoverride something by marking for edit, delete everything, and hit return will not recover the "native" item number (whatever this is supposed to be), but result in an empty field:

-> ???

Cheers, Bert

Re: BOM item override

YannickEnrico — Tue, 30 Jan 2024 12:33:26 GMT

I haven't found a way to un-override them (which is odd, indeed), but you can right click and renumber them. Maybe that works for you?

Re: BOM item override

Bert_Bimmel — Tue, 30 Jan 2024 12:45:23 GMT

Sorry, but I'm not looking for a workaround, but for some explanation of what's going on there.

Oddly, if I re-enumerate it all not using the built in re-enumeration, but a macro instead which enumerates it in my company's style, all part items are'nt marked as overridden, whereas all assembly items are.

If I then change some part's item-number manually again, it will be marked as overridden too:

I cannot see how this is supposed to make any sense.

Re: BOM item override

Mario.VanWiechen — Tue, 30 Jan 2024 13:05:57 GMT

If you hover over a box in the BOM and then RMB a menu will show, at the bottom is " Static Value ". Click it and the value from the part will display.

JUst a note though from bitter personal experience, overriding BOM values is a rookie mistake. Inventor is powerful parametric software and there is a better way

Re: BOM item override

Bert_Bimmel — Tue, 30 Jan 2024 13:17:51 GMT

Talking about rookies:

This is the BOM-dialog from the drawing environment:

I totally agree, that it isn't a good idea to override something here.

I was actually talking about the BOM-Dialog from the Assembly-Environment. There is no such thing as a "static value":

Changes made here to any of those cells who are linked to one of the row's source-document's iPorperties will update the source. Other's are ineditable such as the file's name. And some are completely random as they aren't linked to anything and do only exist in the current assembly's context: e.g. the item-number.