Problems whit Inverted Normals

Hello. I have a problem with a 3D file to print; it was created with Rhinoceros8 and there it appears closed and without anomalies, but once exported in STEP on GrabCad for Stratesys the surfaces of the file appear with the normals inverted, even reconstructing entire parts of the object this result persists, instead exporting in STL format the solid appears perfect as the original, do you have any ideas why this happens?