1. IXMLDOMNode::get_xml method is returning a BSTR.
2. Are you running under x86 or x64? Usually x86 can only see upto 2GB after 
that you need to turn on /3G flag.
3. to access full 4GB you need to switch to x64.

-- 
Regards,
- Umut Alev [MSFT]

This email sent from a machine running Vista RC1.


"Anthony Jones" <Ant@y...> wrote in message 
news:eZ9TYV3yGHA.4576@T......
>
> "Vivek" <vivekd@o...> wrote in message
> news:44f43bcb$0$25358$afc38c87@n......
>> Hi Anthony,
>>
>>
>> Here is the example:
>>
>> ---
>> HRESULT hr;
>> CComBSTR testString;
>> hr = GetNodePtr()->get_xml(&textString);
>> unsigned int strLength = textString.Length();
>> ---
>>
>> Actually, I tried it again now, and I got hr = E_OUTOFMEMORY, rather
>> than hr = S_OK like last time. I have 4GB of physical memory on this
>> system and it seems have to only used up 1.5GB (the application that
>> instantiates the DOM alltogether).
>>
>> Is there a way to allow MSXML6 to use more memory?
>>
>
> I doubt it.  XML is not a technology really expecting this sort of size of
> data (at least not held as a DOM all at one time).  The amount of data
> involved really indicates that some sort of indexed file system ought to 
> be
> used instead for persisting and querying this data.
>
> Despite having 4GB of memory by default the user mode memory map is only 
> 2GB
> and everything in the process that isn't shared with other processes has 
> to
> be held in it.  It would appear that you are running out of this memory.
>
>
>
>> More info:
>> ---------
>> &textString is now <Bad Ptr>
>> strLength = 0
>> GetNodePtr() is of type: "IXMLDOMNode *<Class>::GetNodePtr(void) const"
>>
>>
>> Regards,
>>
>> Vivek
>>
>> Anthony Jones wrote:
>> > "Vivek" <vivekd@o...> wrote in message
>> > news:44f42dbd$0$22363$afc38c87@n......
>> >
>> >>I forgot to mention that I am using the IXMLDOMNode object in C++ and
>> >>nodes that are not too big (< 200MB) seem to be fine, but anything
>> >>beyond 200MB seem to return as empty strings! Any explanation for why
>> >>this might be occuring?
>> >>
>> >>
>> >
>> >
>> > Can you show a code snippet of how it is called?
>> >
>> > What is the value of the returned HRESULT?  Is it S_OK?
>> >
>> >
>> >
>> >
>> >>Regards,
>> >>
>> >>Vivek
>> >>
>> >>Vivek wrote:
>> >>
>> >>>When I am attempting to retrieve the contents of a very large node in 
>> >>>a
>> >>>DOM document with the get_xml(BSTR *xmlString) member function, the
>> >>>pointer is leading to am empty string.
>> >>>
>> >>>Is there a documented limitation of how large a particular node in
>> >>>MSXML6 can be? I've searched on MSDN and the MSXML6 SDK without any
>> >>>success...
>> >>>
>> >>>If a Microsoft support representative can respond to this, then that
>> >>>would be great.
>> >>>
>> >>>
>> >>>Regards,
>> >>>
>> >>>Vivek
>> >
>> >
>> >
>
>