Mirroring Elements Issues

[jacsmithstrongtie]

Hello everyone,

I am looking for some help with a using the ElementTransformUtils.MirrorElements(doc, MirElems, MirPlane, False).

The transaction does not commit and the Exception reads 

I have wrapped this in ElementTransformUtils.CanMirrorElements() and the result is true.  So, my question is why would this be happening?  Is there a way to see where the bad element(s) may be?

Any help would be greatly appreciated!

Thank you

[Mohamed_Arshad]

Hi @jacsmithstrongtie 

       This exception rises when you try to mirror pinned elements, Place a checkpoint Before mirroring to check the element are Pinned or Not.

Exception Reference Image:

MirrorElements Method (Document, ICollection(ElementId), Plane, Boolean) 

Reference Code

///Check the element is Pinned to Not
                if (e.Pinned)
                {
                    e.Pinned = false; ///Un-Pin the element if it is pinned
                }

Hope this will Helps 🙂