> 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?
answer:
You should first compile your subroutine and than just
link within option of abaqus
abaqus job=name input=input_file_name
user=user_object_name.o
Have fun