I am using the Abaqus adjustable rigid torus addin to model balloon angioplasty in stenting procedures. The artery is already compiled to an object file (.obj). I will also need to use a uhyper subroutine to model the artery's hyperelastic behavior. I have written the subroutine. I know that Abaqus requres that there only be one subroutine file. How can I use my subroutine in conjunction with the pre-compiled addin? Is there a method to link the two files?