I'm trying to export analytic surfaces to STEP. Instead of CYLINDRICAL_SURFACE I'm getting B_SPLINE_SURFACE. What else do I need to set to get this to work?

moi.ini says:

[NURBS Export]
WriteAnalyticCurves=y
WriteAnalyticSurfaces=y
RotateZUpToYUp=n
SupportSubObjectStyles=y
WriteBlankedObjects=n

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