edit sline property using autolisp

[WinslowNorth]

i can access the propery i want to edit but vlax-put-property returns the message "ActiveX Server returned an error" Type mismatch"

below is an example of the autolisp code i am using.

(setq e (car (entsel)))
(setq vlaobj (vlax-ename->vla-object e))
(vlax-get-property vlaobj 'InsulationType)
(vlax-get-property vlaobj "InsulationType" "?")

[jabowabo]

You can read some P3D properties with the LISP API, but you cannot modify any properties with it. The .NET API is the only API that supports this.

[DVaquand]

Hello @WinslowNorth 

If you Dump the VLA entity you will see that the Plant3D properties (P&ID or 3D) are read-only.
(vlax-dump-object <entityName>)
To be able to modify Plant 3D properties, you must use the DotNet APIs.

== French ==

Si vous faites un Dump de l'entité VLA vous verrez que les propriétés Plant3D (P&ID ou 3D) sont en lecture seule.
(vlax-dump-object <entityName>)
Pour pouvoir modifier des propriétés Plant 3D il faut passer par les API DotNet.

Cordialement
Dominique VAQUAND
www.dovaq.fr