Delete Reference Plane greyed out

[rob.pnc]

How to delete such reference planes. See attached family. Revit 2018.3

[RobDraw]

Do you get any messages when you try to delete them?

[rob.pnc]

@RobDraw 

No ... no messages what so ever.

Delete button on the ribbon as well as the Right Click menu are disabbled

Using Kb delete does not respond too.

Tried to upgrade the family to 2019 and 2020 ... same thing. the family is attached in first post 

[ToanDN]

Built in ref planes cannot be deleted. Only user added ref planes can be deleted.

[rob.pnc]

They are user created families and nested parts of a bigger family. Production line changed and now we need to cleanup the old ones and readjust to suit the new production model. There were several other parameters which I already deleted from the family above for privacy reasons  till I was left over with the reference planes

Atteched is another sample of a different nested family with dimensions and elements which I am not able to delete

[RDAOU · Accepted solution]

Those are RP, Dims and elements which were added to your custom company templates. Some purposly do that to lock delete (after the finish they rename family to .rft and recreate the .rfa)

If your intention is to delete them and start fresh you need to do so in the .rft files which your family was initiated from, rename it to .rfa and delete them from therein

[rob.pnc]

That worked and I was able to get rid of most unnamed reference planes  but there are still some dimensions I am not able to delete. Any ideas

[RDAOU · Accepted solution]

Place a new/temporary reference plane >> select the dimension >> grab its witness line and drag it to the new reference plane >> delete the temporary reference plane ... this should delete the sticky dims

[lee.imbimbo86EM4]

I'm having a similar issue were the reference plane won't let me delete it.  I've tried what you said, which is to rename the file type from RFT to RFA.  But it still won't let me delete it.  I've attached it for reference