Dear Breen,
It looks like you are running OpenFAST v2.5, but your InflowWind file is formatted for an earlier version. From the OpenFAST online documentation–see: openfast.readthedocs.io/en/mast … hange.html, you’ll see that VFlowAng was added to the InflowWind primary input file between OpenFAST v2.4 and OpenFAST v2.5.
Best regards,