Topic: Where layers can be referenced other than Block definition

[Coder]

Hello guys,

Where can a layer name be referenced in a drawing other than Block definition?

I have moved objects that lay on a specific layer names to another then after trying to delete the old layer names from the drawing, I received a message :
; error: Automation Error. Object is referenced by other object(s)

Thanks in advance.

[Lee Mac]

Can you post the drawing?

[Crank]

Hello guys,

Where can a layer name be referenced in a drawing other than Block definition?

[…]

XDATA

[rkmcswain]

Not sure if you were including this, but anonymous blocks also.
If you're working in a vertical product (such as Civil 3D), then in styles.

[Crank]

Try LAYTRANS to map the stubborn layer to layer 0

[Coder]

Can you post the drawing?

Thank you Lee for your kind reply.
After digging into the drawing that I received from the client, I found is that there are attributed blocks in blocks and after adding codes to work around that matter, I got it working correctly now.

Hello guys,

Where can a layer name be referenced in a drawing other than Block definition?

[…]

XDATA

Thank you Crank for your kind reply.
Can the XDATA reference a layer to be prevented from purge? I think XDATA is just a string that represents a layer name in this case nothing else unless I miss something here!.
Can you please clarify your point on this?

Not sure if you were including this, but anonymous blocks also.
If you're working in a vertical product (such as Civil 3D), then in styles.

Thank you, that is a very good point.

[rkmcswain]

Can the XDATA reference a layer to be prevented from purge? I think XDATA is just a string that represents a layer name in this case nothing else unless I miss something here!.

Yes, absolutely.


From the Customization Guide:





You can attach Xdata to layer 0 referencing a layer, to keep that layer from being purged (since layer 0 can't be purged)... unless of course, someone knows how to remove that xdata.

[Coder]

Can the XDATA reference a layer to be prevented from purge? I think XDATA is just a string that represents a layer name in this case nothing else unless I miss something here!.

Yes, absolutely.

You can attach Xdata to layer 0 referencing a layer, to keep that layer from being purged (since layer 0 can't be purged)... unless of course, someone knows how to remove that xdata.

That make sense.
Thank you so much.

[ahsattarian]

I've written this, but it doesn't work

Code - Auto/Visual Lisp: [Select]

1. (defun c:a ()
2.   (cond ((= (getvar "clayer") "0") (exit)))
3.   (setq s (tblobjname "layer" "0"))
4.   (setq en (entget s '("*")))
5.   (print en)
6.   (setq app "XLayer")
7.   (setq code 1003)
8.   (setq txt (getvar "clayer"))
9.   (setq en (entget s (list app)))
10.   (if (assoc -3 en) ;|  #Xdata  |;
11.     (setq en (subst (list -3 (list app (cons code txt))) (assoc -3 en) en))
12.     (setq en (append en (list (list -3 (list app (cons code txt))))))
13.   )
14.   (entmod en)
15.   (setq en (entget s '("*")))
16.   (print en)
17.   (princ)
18. )

Would U please help me   ?

[Crank]

You need to register your external entity data first, so there is an unique identifier for your own XDATA:

Code: [Select]

(regapp "XLayer")After you've registered this name is entered into the APPID symbol table.

[ahsattarian]

Thank u very much indeed  !!!   -    It worked !!!