Maybe read this https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/flu_udf/flu_udf_DynamicMeshDEFINE.html%23flu_udf_sec_define_grid_motion as it's the one I used. DEFINE_PROFILE is for properties on a boundary, so velocity, temperature etc and is nominally superseded by Expressions.
If the built in compiler is returning a load of complaints it's usually a good idea to read these and fix them.
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