Referencing your part or assembly mass in your drawing and sick of seeing the dreaded "N/A"?? Mass Updater is what you're looking for!

Instead of having to open the model from the drawing....navigate to "iproperties".....navigate to the "physical" tab.....click the update button......then return to the drawing. You can now use the "Update Model Mass" button in the drawing environment to update the physical properties of your base model.