AutoCAD Inventor :: Work Point Proxy Type Mismatch

I'm working on mating two assemblies together by work points on a part inside of them. Here is the code I'm using. It worked with work planes, but when repurposed it to work points, I get a type mismatch when the code tries to generate the work point proxies:

Dim oPartPoint1 As WorkPoint oPartPoint1 = oOcc1.Definition.WorkPoints.Item("botMatePoint") Dim oPartPoint2 As WorkPoint oPartPoint2 = oOcc2.Definition.WorkPoints.Item("matePoint") Dim oAsmPoint1 As WorkPointProxy oOcc1.CreateGeometryProxy(oPartPoint1, oAsmPoint1) Dim oAsmPoint2 As WorkPointProxy oOcc2.CreateGeometryProxy(oPartPoint2, oAsmPoint2)