UPF gives different results with the same input file

- February 18, 2022 at 8:45 am
  
  dka
  Subscriber
  
  Hello
  I have a question regarding UPF, I have coded a user defined element with Fortran and I linked it with APDL through oneAPI compiler. My doubt is sometimes the results are correct and sometimes not! with EXACATLLY the same input file ! I don't know if this may be a compiler problem or not!
  Any help would be appreciated!
  Thanks!
- February 18, 2022 at 4:11 pm
  
  David Weed
  Ansys Employee
  
  Hi @dka, can you let me know which version of ANSYS are you using? We have specifications for which compilers are supported for a given version. ANSYS doesn't officially support oneAPI, and this could be a source of inconsistent results.
- February 21, 2022 at 2:08 pm
  
  dka
  Subscriber
  
  thank you very much for your reply. What I have discovered later is that this happens when I calculate the stiffness matrix and internal force vector in an early step, depending on the pure input TotValDofs. In the Userelem.F file they are calculated later. As I understood, calculating them early affected the displacements values in the next iterations and also the force vector itself was not being calculated by the true displacements.

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