Currently there is no API support for updating a parts list style, so we have to use some workarounds.
Example:
If we have an existing a parts list on a drawing that uses a style of a certain name ( let's say PartsListStyle1) and the style changes, the existing parts list will still be using the old version of the style ( as an override of sorts), and we have to set the parts list to use a different parts list style temporarily, and then set it back to the original style to get it to update.
It would be nice to be able to use something like this:
Dim oDoc As DrawingDocument = ThisApplication.ActiveDocument
Dim oPartsList As PartsList = oDoc.ActiveSheet.PartsLists(1)
oPartsList.Style.UpdateFromLocal
related link:
https://forums.autodesk.com/t5/inventor-programming-forum/update-parts-list-in-idw/td-p/14120743
