I have been trying to use the UMAT subroutine in Abaqus 2019 with visual studio 2019 and Intel OneAPI Fortran Compiler (the latest one). But I'm always stuck with this error message when I run my job. Is there anyone who knows its solution techniques? It would be a great help if possible.

Thanks.

Begin Compiling Abaqus/Standard User Subroutines
9/2/2021 2:57:14 PM
Intel(R) Fortran Intel(R) 64 Compiler Classic for applications running on Intel(R) 64, Version 2021.3.0 Build 20210609_000000
Copyright (C) 1985-2021 Intel Corporation.  All rights reserved.

End Compiling Abaqus/Standard User Subroutines
Begin Linking Abaqus/Standard User Subroutines
   Creating library standardU.lib and object standardU.exp
slip-behavior.obj : error LNK2019: unresolved external symbol tatev referenced in function umat
slip-behavior.obj : error LNK2019: unresolved external symbol slipstatev referenced in function umat
slip-behavior.obj : error LNK2019: unresolved external symbol strnthinstatev referenced in function umat
standardU.dll : fatal error LNK1120: 3 unresolved externals
Abaqus Error: Problem during linking - Abaqus/Standard User Subroutines.
  This error may be due to a mismatch in the Abaqus user subroutine arguments.
  These arguments sometimes change from release to release, so user subroutines
  used with a previous release of Abaqus may need to be adjusted.
Begin Convert MFS to SFS
9/2/2021 2:57:16 PM
Run SMASimUtility.exe
9/2/2021 2:57:16 PM
End Convert MFS to SFS
Abaqus/Analysis exited with errors