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Expression error recurred

User: "TedTsai"
TedTsai
Altair Community Member

Hi Everyone,

An error was encountered.

The version used is MotionView/MotionSolve 2022.2

When checking the Model, the following error will pop up:

Message Log.png

The error was found at:

εœ–η‰‡2.png εœ–η‰‡3.png

No modification is required.

After selecting Evaluated, the error disappears temporarily.

εœ–η‰‡4.png εœ–η‰‡5.png

After saving the model, reopen the model and the same error will occur again.

Message Log.png

How can I eliminate this error?

Best regards,
Ted

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MotionView/MotionSolve
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    User: "Orestis_YB"
    Orestis_YB
    Altair Employee

    Hello @TedTsai,

    are you facing this issue also when creating a new model using the assembly wizard? After you evaluate the expression are you able to run the simulation? As a first step I would suggest to perform a HWCleanup. Go to the installation directory and under hwdesktop β†’ utility β†’ HWCleanup run the HyperworksWindowsCleanup.bat . This will discard all the preferences so you may need to load again Vehicle Library before working on your model.

    Hope this helps!

    Best regards,
    Orestes

    User: "TedTsai"
    TedTsai
    Altair Community Member
    OP

    Hi @Orestis_YB

    I found the same error in Data Summary.

    θž’εΉ•ζ“·ε–η•«ι’ 2025-04-10 165005.png

    As long as I check Evaluated,
    New errors will occur.
    And it cannot be reversed.

    θž’εΉ•ζ“·ε–η•«ι’ 2025-04-10 170805.png θž’εΉ•ζ“·ε–η•«ι’ 2025-04-10 170825.png

    I deleted the abnormal part in the mdl file.
    The error disappeared.

    εœ–η‰‡250411.png

    I guess clicking data summary seems to change the mdl, but I don't know the logic behind it.

    Best regards,
    Ted

    User: "Orestis_YB"
    Orestis_YB
    Altair Employee
    Accepted Answer

    Hello @TedTsai,

    have you tried with a new model from assembly wizard? Do you see the same behavior there? If not then some of the modifications that you've made maybe created this abnormal behavior. If yes, can you try the HWCleanup? I tried myself with version 2022 and I don't see such a behavior in assembly wizard model. If the error persists I would suggest to create a support ticket to connect immediately with a specialist. I would also suggest to migrate to latest release where potential defects are resolved and new tools are added to make Vehicle Library more efficient and robust.

    Best regards,
    Orestes

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