Dear All,
I am trying to run the VUMAT interface by Prof. Binen with the Sand Hypoplasticity. However, when I run the simulation Abaqus returns the following error: “Problem during linking – Single Precision Abaqus/Explicit User Subroutines. This error may be due to a mismatch in the Abaqus user subroutine argument”.
The versions of the programs that I am using are: Abaqus 2020, the visual studio 2019, OneAPI compiler v2022. When I run the Abaqus verification, it says PASS for everything (also subroutines), so I assume they are correctly linked.
Someone had the same problem and knows how to solve it?

  1. Ahmad Moeineddin
    Ahmad Moeineddin 6 months ago

    Dear Giada Orlando,

    Hopefully, your problem is already solved. But, I faced the same issue a while ago. If the command “abq2020 verify -user_exp” gives you “PASS”, then the problem is hidden in the subroutine. One quick action would be making a Dynamic-link Library in Visual Studio with your VUMAT and checking if it compiles.

    Best Regards,

  2. Michael Spyridis
    Michael Spyridis 5 months ago

    Dear Giada,

    In order to solve this problem, you should replace the function “stop” with “call XPLB_EXIT” in your VUMAT.
    The corresponding answer for the UMAT can be found here:

    Kind regards,

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