I got the following errors when I tried to submit a job with the subroutine usub_3d.for

[ZhijunZhou128]

Thank you. I got the following errors when I tried to submit a job with the subroutine usub_3d.for.

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LINK : warning LNK4044: 无法识别的选项“/DEBUG/nologo”；已忽略
正在创建库 standardU.lib 和对象 standardU.exp
usub_3d.obj : error LNK2019: 无法解析的外部符号 GETOUTDIR，函数 USUB_UTILS_MOD_mp_GET_FID 中引用了该符号
usub_3d.obj : error LNK2019: 无法解析的外部符号 XIT，函数 USUB_UTILS_MOD_mp_GET_FID 中引用了该符号
usub_3d.obj : error LNK2019: 无法解析的外部符号 DGESV，函数 BC_MOD_mp_GET_FDOFS 中引用了该符号
usub_3d.obj : error LNK2019: 无法解析的外部符号 DBFILE，函数 URDFIL_MOD_mp_GET_NODE_DATA 中引用了该符号
usub_3d.obj : error LNK2019: 无法解析的外部符号 POSFIL，函数 URDFIL_MOD_mp_GET_DATA_FIRST_TIME 中引用了该符号
standardU.dll : fatal error LNK1120: 5 个无法解析的外部命令

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I'm not sure what's wrong with my settings.

[KnutAM]

It looks like mkl is not installed correctly (and possible even something for the regular abaqus subroutine since XIT is not there either).
Did you check that abaqus verify -user_std works ?

I realize now that I cannot find in the documentation the requirements for having mkl, which seems to be the issue.
So you should add "/Qmkl" to the compile_fortran list in your abaqus_v6.env file
This can be done by writing e.g.

compile_fortran = compile_fortran + ["/Qmkl",]

If your fortran compiler is v16 or newer, you should probably add

compile_fortran = compile_fortran + ["/Qmkl","/nostandard-realloc-lhs", "/names:lowercase"]

instead.