I have a problem when running FASTv8 with OrcaFlex interface. I used the sample file for OC3-Hywind spar downloaded from OrcaFlex website. According to the instruction, by running FAST as normal, a .OUT file is generated by FAST and a .SIM file is supposed to be generated by OrcaFlex. The sample file can be normally run, however, I have only the .OUT file produced. Does anyone know why the .sim file is lost? Many thanks!