Custom iProprerty expression =<MASS> =<VOLUME> is N/A

[p.rybar]

Problem to solve:

I have one custom iProperty set to expression "=<MASS>" and the other to "=<VOLUME">. I am processing large number of files (150k). About 5% files does not update the expression value. The value - in czech "(není)" ( english translation "(none)" or "N/A" ) is displayed. I tried several methods to update mass:

Inventor.PartDocument.Update

Inventor.PartDocument.Update2

Inventor.PartDocument.Rebuild

tmp = Inventor.PartDocument.ComponentDefinition.MassProperties.Mass

None of them works.

Using GUI the update in iProperties Physical prop tab does not work. The only thing that works is to click on "2":

I need API code to duplicate this action, but I rather have the full code than inventorApp.CommandManager.ControlDefinitions.Item  ("xxx").Execute()

Sample file attached.

chyparo

Inventor 2014 SP2

[humbertogo]

Try to Flush

Doc.PropertySets.FlushToFile()

[p.rybar]

This method works in Apprentice only 😞

[humbertogo]

http://forums.autodesk.com/t5/Inventor-General/How-to-find-the-Mass-Properties-of-a-Part/td-p/326829...

Make sure the Material is set correctly.  The mass is shown in the properties near the middle of the dialog box.  If it is showing as N/A, click the Update button and it should fill in.

[p.rybar]

Please, if you want to help me, open the sample ipt. The material is OK, the mass in the physical property tab is OK, problem is in custom property tab in expression =<MASS>.

[humbertogo]

i did open the file

Please, change the material to ABS Plastic apply and look the Custom properties

[p.rybar]

Material changed to ABS (select ABS from list, then Click on Apply):

-screenshot of Physical tab:

 

-screenshot of Custom tab is same as before:

 

The Value is not updating - the only way to update value is as I wrote in my first post. So just another Inventor BUG.

[humbertogo]

Take a look at the recorder screen

[p.rybar · Accepted solution]

Thank you for the video - it definitely shows, that the error is in material asset. I repeated your procedure and several materials do not throw the error. So I focused on this an the solution is to switch material asset to another asset and back.