I don't believe you will the plane information in RevisionManager. If you could
run your program in Part environment, you might look for the Plane property of the
and the second from an answer of an IR I opened:
"There is no way to obtain infomation on Solid Edge objects by opening the part file in Revision Manager. Revision Manager only deals with links and not Solid Edge objects inside the file in question. For access to Solid Edge objects you have to actually open the part file in Solid Edge itself (Of course you can do this by your code).
If you open the part in SE then you can do something like following in your code to get to the plane that was used to mirror.
'Assuming the part with mirror part copy is currently open in SE
Set objApp = GetObject(, "SolidEdge.Application") Set objDoc = objApp.ActiveDocument Set objModel = objDoc.Models(1)
Set objCopiedPart = objModel.Features.Item(1) Set objRefPlane = objCopiedPart.Plane '
Here is the code in C# that worked for me:
SolidEdgePart.PartDocument part = (SolidEdgePart.PartDocument)m_document;