Hello, I have a question regarding version compatibility in ABAQUS. I have the input file of a coupled thermo-mechanical simulation which I got from a collaborator who works on ABAQUS 6.14 and I am getting error(the simulations fails to converge )/warnings( smoothing abandoned due to ill-formed elements)  when I run the same simulations on ABAQUS 2018. This particular simulation uses the DFLUX and UMESHMOTION subroutines along with Adaptive remeshing controls. The VS and Fortran versions are also different however when I run the verification it tells me that the user subroutines have passed successfully. I assume that means that the simulation should be set up correctly. Could someone help me understand what could be going wrong? Is there a way to export the model in a way that its compatible with the newer version? I can share the .inp and .f if needed.  Thanks.

Edu ​​​​​​​3DEXPERIENCE ​​​​​​​Abaqus ​​​​​​​