Topic: Entmake after layer creation throws exception!

[zoltan]

This is driving me nuts!  I create a line with EntMakeX and in the DXF list I have a routine that checks if a layer exists.  If not it creates the layer and assignes it the color specified.
like this.

(EntMakeX (List '(0 . "LINE") (Cons 8 (CheckLayerName "Maintained" ) '(10 0.0 0.0 0.0) '(11 0.0 0.0 0.0)))

The layer is created correctly and the color is set, but when it gets back to the EntMakeX, it thows an exception:
; error: Exception occurred: 0xC0000005 (Access Violation)
; warning: unwind skipped on exception
; error: Exception occurred: 0xC0000005 (Access Violation)

when you try to save the drawing, AutoCAD crashes with a CER.

This is AutoCAD 2006

I have attached the file, let me know if you guy get the same result.

[Jeff_M]

Nope....

Command: crashme
<Entity name: 7ef7df10>

Worked first time/everytime.....although this isn't Vanilla Acad. This was tested with the "Land Enabled Map" option of Land Desktop 2006, SP1.

[Kerry]

Why are you defining the line with zero length ?

I seems to work as expected if there is a differential between start and endpoints.

[Kerry]

..and yes, in AC2006 the posted code spits the dummy

; error: Exception occurred: 0xC0000005 (Access Violation)
; warning: unwind skipped on exception
; error: Exception occurred: 0xC0000005 (Access Violation)
; error: Exception occurred: 0xC0000005 (Access Violation)
; error: Exception occurred: 0xC0000005 (Access Violation)
; error: Exception occurred: 0xC0000005 (Access Violation)
_$

.. continuable sometimes ..
then FATAL ERROR if save attempted

[Glenn R]

It's most likely crashing because you haven't assigned an owner to the newly created object - then when it goes to save...BOOM!
EntMakeX creates an entity, but it DOES NOT assign an owner to that entity. Try using EntMake instead.

Cheers,
Glenn.

[Kerry]

DUH ! I Couldn't see the forest for the trees ..

[Glenn R]

That twice in less than a week Kerry 

Merry Xmas,
Glenn.

[Kerry]

 


Seasons Greeting to you too Glenn

Be Well
Kerry

[zoltan]

I am defining a line with 0 length because I will be moving the endpoints later with EntMod.  Making them different still crashes for me.  Also I need the ENAME so I don't want to use EntMake, beside it still crashes.  I just installed Service Pack 1a for Mechanical Desktop and it still crashes.  I have Inventor Series 10 loaded.

Glenn, please explain to me this idea of assigning an owner to an object after making it, because that is new to me.

[Kerry]

Just change the EntMakeX to EntMake.

[SMadsen]

Zoltan, if the only thing you want is to have an ename returned you should be able to grab it after using ENTMAKE. For built-in functions that mess with the drawing database, it's far more important what the function does than what it returns.

A simple inline example of grabbing the ename could be:

Code: [Select]

(cond ((entmake (list '(0 . "LINE")
                      (cons 8 (CheckLayerName "Maintained" 8))
                      '(10 0.0 0.0 0.0)
                      '(11 20.0 10.0 0.0)
                )
       )
       (setq ename (entlast))
      )
)

[zoltan]

Using Entmake instead of EntmakeX still causes an exception for me.

 So what is the difference between EntMake and EntMakeX.  I always thaught that the first returns the EData and the latter returns the EName.  So what is this stuff about assigning an owner? How do you do thais in Lisp?

[LE]

I do not have A2006.

What happens if you use visual lisp activex function instead of entmake ?

[zoltan]

Ok, I figured out this stuff about owning objects.

When I use VLA-AddLine, it thows and exception and crashes imediatelly with a CER

[zoltan]

ok, Sorry, VLA-AddLine works, I just did'nt change it for all of them.

That is the way it will have to be then.