Rob
Ansys Employee

Face thread isn't passed by the macro (no f in the macro), so I wonder if https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/flu_udf/flu_udf_GenPurposeLoopingMacros.html%23flu_udf_sec_thread_loop_f  is what you'll need.