Skip to main content
W
wbottis14-Alexandrite
14-Alexandrite
June 8, 2026

Mass properties via "Geometry and Parameters" not updating

  • June 8, 2026
  • 2 replies
  • 30 views

Reference to topic - 


In a prior version of Creo, I had a mapkey that would update the PRO_MP_MASS value of my top assembly by aggregating the lower level components. I still have the mapkey and it still runs, but I don’t remember the steps it uses. I suspect it is simply FILE > PREPARE > MODEL PROPERITES > CHANGE > GEOMETRY AND PARAMETERS > CALCULATE> OK. This parameter was shown in my model tree and I could monitor it throughout the design. My organization updated us to version 10 and this feature changed somehow and I don’t know how or why. Anyone know what changed to regress this very useful workflow I had going?

    2 replies

    tbraxton
    22-Sapphire II
    tbraxton22-Sapphire II
    22-Sapphire II
    June 9, 2026

    Mapkeys are not supported across new releases, many times they work but sometimes you will need to recreate the mapkey in the new release for it to work as intended. Having said that I have no idea if that is the root cause of your issues.

    You can look at the trail file in Creo 10 when running the mapkey to get some information about what it is doing or not doing. Is the parameter of interest present in the model when opening it in Creo 10? If it is in the model, then you can track the value of that parameter before and after you run the mapkey even if you are not seeing it in the model tree. Use the parameter editor or better yet create an annotation note including the parameter in the model so it is displayed in the geometry window of the top-level assembly and you will see the value update in the graphics window.

    W
    wbottis14-AlexandriteAuthor
    14-Alexandrite
    June 9, 2026

    Thank you. As I say, I believe the mapkey was FILE > PREPARE > MODEL PROPERITES > CHANGE > GEOMETRY AND PARAMETERS > CALCULATE> OK and I have done this manually to no avail. The top-assembly PRO_MP_MASS will not update for the assembly. It could be because not all the parts have an assigned density or mass. Prior versions assigned a default density of 1. This version does not do this. So, the system may be balking at that.

    tbraxton
    22-Sapphire II
    tbraxton22-Sapphire II
    22-Sapphire II
    June 9, 2026

    Have you reviewed this article that explains details on how these calculations are handled? It specifically lists the following among other things: 

    • Use geometry source with clearly defined density for all mass properties calculations

    https://www.ptc.com/en/support/article/CS180789?&as=1

    W
    wbottis14-AlexandriteAuthor
    14-Alexandrite
    June 9, 2026

    I have read CS180789, CS189205, and CS60265 so far. I am going to go back to the assembly and make sure each and every part has a density assigned. There are some parts that require an assigned mass because they are commercially purchased and must be weighed manually. But, I think assigning a mass to some of these parts may also be contributing to the issue with aggregating the total mass of the top assembly.

    Terms & ConditionsAccessibility statement