BOM row ComponentDefinitions null after updating file reference

[AdrianSaf]

I have an assembly like this that contains a link to an Ipt:

Asm1.iam

--> Part1.ipt

In an external c# stand alone application, using Inventor 2018 Application COM:

• I do a ReplaceReference on the Part1.ipt to change it to Part1_1.ipt (it's just a copy of the original ipt with the part number changed) - this works with no problem.
• After I do this I try to read the structured BOM on the iam (I'm reading the part number for each row). When I get to the row associated with the ipt the ComponentDefinitions property for the row is  null.
• I tried doing and Update on the document before reading the BOM, also tried a save (even a rebuild) - this did not solve anything. The only thing I found that fixes this (to get ComponentDefinitions for the row) is to save the iam document and then reopen it.
• It seems to me like there should be a way to force the refresh without needing to re-open the file (it take time to do that) - is there a method ?

[MechMachineMan]

Maybe it's an issue of your variable still accessing old data instead of seeing new stuff? try accessing the BOM again from the document and then going down to the component definition?

[AdrianSaf]

Hello,

I don't get the bom until I make the reference changes - so there is no variable to refresh - only the one keeping the document.