shape binder for plane?

[garya]

Is there a reason one cannot use a shape-binder to reference a plane?
I need to mirror a feature in one body around a reference plane in another. I managed to do it without using a shape-binder by referencing the plane directly (I think that's how I did it), but I get messages saying "Links go out of scope".
If I attempt to create a shape-binder for the plane, I get the message "Error".

OS: FreeBSD 11.3-RELEASE-p12
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.0.18.4
Build type: Release
Python version: 3.7.8
Qt version: 5.14.2
Coin version: 4.0.0
OCC version: 7.4.0.beta
Locale: C/Default (C)

[chrisb]

You can use a ShapeBinder of a DatumPlane, alas you cannot see it. So you have to select it from the tree when selecting the custom plane. You may need 0.19 to do so.

[garya]

Thanks