topic Re: AcDbDatabase constructor failed why? in ObjectARX Forum

AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 03:08:34 GMT

AcDbDatabase* db = new AcDbDatabase(Adesk::kFalse, Adesk::kTrue );

is the only line of code. I amk trying to instantiate the Da6tabase object toopen adrawing.

I get heap errors everytime.

Can anyone help

Nick

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 04:05:33 GMT

Nick:

> I get heap errors everytime.

You need to delete the database after you're finished with it. 🙂
--
Owen Wengerd
President, ManuSoft ==> http://www.manusoft.com
VP Americas, CADLock, Inc. ==> http://www.cadlock.com

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 13:22:38 GMT

how? should I open it with a different object first.

I set it to null, is there a delete method or something?

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 13:43:45 GMT

After running this code the db pointer is still NULL?

Out of memory i think...

nick5454 wrote:
> AcDbDatabase* db = new AcDbDatabase(Adesk::kFalse, Adesk::kTrue );
>
> is the only line of code. I amk trying to instantiate the Da6tabase object toopen adrawing.
>
>
>
> I get heap errors everytime.
>
> Can anyone help
>
> Nick

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 13:50:12 GMT

try

delete db;

wrote in message news:4838459@discussion.autodesk.com...
how? should I open it with a different object first.

I set it to null, is there a delete method or something?

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 17:23:17 GMT

actually the pointer is valid but somewhere after is creates AcDbDatabase is fails with the heap.

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 17:24:50 GMT

looks like allocRawMem fails.

Re: AcDbDatabase constructor failed why?

Anonymous — Mon, 09 May 2005 18:00:24 GMT

so it creates the object. then before it finished with the constructor it calls delete for some reason and bombs.

Please someone help

Re: AcDbDatabase constructor failed why?

Anonymous — Tue, 10 May 2005 07:47:41 GMT

try this:

AcDbDatabase* db = NULL;
try
{
db = new AcDbDatabase(Adesk::kFalse, Adesk::kTrue );
}catch(...)
{
//put a breakpoint here to see of an exception is thrown
}

also try to change the parameters values of the constructor to see what
heapens

nick5454 wrote:
> so it creates the object. then before it finished with the constructor it calls delete for some reason and bombs.
>
> Please someone help

Re: AcDbDatabase constructor failed why?

Anonymous — Fri, 13 May 2005 06:27:21 GMT

There are many samples codes in ObjectARX SDK,
and you can learn a lot from it.
so before you post your Question, plz try yourself,

At last, i do not suggest you to using catch(...)

Re: AcDbDatabase constructor failed why?

Anonymous — Tue, 17 May 2005 06:35:32 GMT

You should check if you lock the current document before new a Database.
AutoCAD is developed based on COM model. Even if you use multiple
documents(databases), you still must lock doc except that ACAD has done for
you. acedCommand, and/or your own defined commands, etc. have locked doc
before executiving. And however, in some special cases, for example, while
using modelless dialog, you must explicitly lock it!

In fact, even if you dont delete db, the biggest problem is just memory
leaking, but not crash your app.

Lewis
www.hlsolution.com
HL Block Manager
HL CurveTool
HL STL Import/Export
************************************************************************

?AcDbDatabase* db = new AcDbDatabase(Adesk::kFalse, Adesk::kTrue );

is the only line of code. I amk trying to instantiate the Da6tabase object
toopen adrawing.

I get heap errors everytime.

Can anyone help

Nick