Does fortran 90 can be recognized by abacus?

[yaning]

Hello,

I write a vumat subroutine with fortran 90. (I renamed it as .for)
But when I run it, it always shows error: Problem during compilation
And no more information in .msg .dat or .sat files
Does it mean we must use fortran 77 for subroutines?

Thanks.

yaning

[CF]

Yaning,

There are two things you can do:

1. Rename your *.f90 file as *.for and put !DEC$ FREEFORM as the first line in your code.

2. I haven't tried this but you can add a flag in the environment file (probably called abaqus_v6.env and located in the site sub-directory where your ABAQUS is installed). In the link_sl line add f90. In the compile_fortran line add 'f90 -c -free'

Example:

link_sl='f90 ......'
compile_fortran='f90 -c -free....'

As I said, I haven't tried the second method. Somebody might need to correct me.

Regards,

Cormac

[Jorgen]

No, you can use Fortran 90 just fine. Here's one approach that seems to work on multiple platforms:

(1) Give your source file a name that ends in .f90

(2) Compile your source file using the recommended compiler on your computer. For example, on Linux use a command like: ifort -c sourcefilename.f90
You can use the additional flags, see the flags that ABAQUS uses in the global abaqus_v6.env file.

(3) Run your Abaqus simulation by including the object file on the command line. For example: abaqus interactive job=inputfile.inp user=sourcefilename.o

You can also create a shared library file from a Fortran 90 file, but that is a different topic.

- Jorgen